đổi câu chủ động thành câu bị động

1. someone had invented elctric lights before i was born

2. workers were digging a large hol in the ground

3. before they took exams they had revised their lessons

4. the car knocked a woman down in the street 

5. cows were eating grass on the meadow

Chiến thắng Điện Biên Phủ trên không là chiến thắng như thế nào?

Ở một loài thực vật thế hệ P có 80 cây có kiểu gen Aa và 20 cây có kiểu gen aa tự thụ phấn bắt buộc liên tục qua 3 thế hệ rồi tiếp tục giao phấn ngẫu nhiên . 

Hãy tính tỉ lệ kiểu gen khi các cây trên tự thụ phấn (F3) và giao phấn (F4)

Complete the e-mail. Use the correct form of the words in the box.
                     aim / save              complicated / work out               easy / work               great / have
                     someone / replace               place / stay               time / apply               important / get
                     sure / be               welcome / share               wonderful / hear
Hi Tasha,
Thanks for your letter. It was (0) …..wonderful to hear….. from you. Sorry I haven’t been in touch for a while - the new job is keeping me busy. I thought it would be (48) ……………..………… as a hotel receptionist but the job is more demanding than I expected. Some of the bills are quite (49) ………………… and of course it’s (50) ………………..………… for me ……………..………… them right. Having said that, it’s (51) ……………..………… a job. My (52) …………..………… is
…………..………… £500 by the end of the holidays - that will go a long way towards paying my
tuition fees next year. What are your plans? Why don’t you come here to work? It’s a good (53) ……………..……… for work in the restaurant. One of the waitresses left last week and they’re looking for (54) ……………..………… her. Don’t worry about finding a(n) (55) ………………..……… - you’re (56) ………………..……… my flat with me. They keep you busy here but there’s (57) …………………………..………… time for us to enjoy ourselves too. Think about it.
Erica.

Underline the correct answer.
12. A: I’d like to go / I like going on holiday to a different place every summer.
B: I’d like to go / I like going somewhere different this summer. Any ideas?
13. A: I regret to tell / telling you that your contract will not be renewed.
B: I regret to tell / telling you about it because it upset you.
14. A: He stopped to have / having coffee because it kept him awake at night.
B: He stopped to have / having a coffee and then he went back to work.
15. A: I know you’re tired but please try to concentrate / concentrating for a few more minutes.
B: I’m going to try to drink / drinking warm milk before I go to bed; it might help me sleep better.
16. A: Alice went on to act / acting until she was forced to retire because of her health.
B: Although Alice started out in television, she went on to act / acting on the stage.
17. A: He remembered to close / closing the windows so the rain didn’t get in.
B: He remembered to close / closing the windows so he was surprised to find them open when he got home.

Complete the extract from a story. Use the correct form of the verbs in brackets. Sometimes more than one form is possible.
She invited me (0) ….. to sit ….. (sit) down and then she excused herself from the room. I heard her (27) …………………………..………… (make) the tea in the kitchen and listened as she set out the cups and saucers. The room had begun (28) …………………………..………… (feel) a little odd and I regretted (29)……………………..………… (take) off my jacket. I noticed the fire (30) ………………………..……… (begin) to die down in the grate, watched second hand (31) …………………………..………… (move) slowly round the clock face and wondered how long it would be before she would allow me (32) …………………………..………… (leave). A few minutes later I heard the tea trolley (33) …………………………..………… (roll) on its wheels through the kitchen and then into the sitting room, where I was waiting. I started (34) …………………………..………… (drink) the tea she had poured for me and she let me (35) …………………………..………… (continue) in silence. I felt her (36)  …………………………..………… (watch) me and looked up quickly, hoping to catch her (37)
…………………………..………… (stare) at me, but she was looking instead at the cup of tea in my hand. Nervously, I sipped some more. It tasted slightly of bitter almonds but I carried on (38)
…………………………..………… (drink) it to be polite. At last I finished the unpleasant brew and set my cup down in the saucer. ‘Would you like me (39) …………………………..………… (pour) you another cup?’ she asked. ‘No thank you,’ I said, reaching unsteadily for my briefcase. ‘I must be going if I expect (40) …………………………..………… (be) home in time for dinner.’

bài 3 : give the correct form or tense of the verds in the brackets

1. You ever ( meet )                 a famous football player?

2. give old clothes to charity in stead of ( throw )          them away

3. where you ( go )                 on january 1st 2015?

4. If you ( not like )                this one,I will bring you another

Hãy giải thích vì sao NST là cơ sở vật chất chủ yếu của hiện tượng di truyền và biến dị ở cấp độ tế bào 

bài 2 : choose the correct option ( A,B,C or D ) to complete the folowing sentences 

1. I know you are ill . I hope you            fell better again

A. will                       B. won't                  C. do            D. are 

2. Disney Channel is one of               channels for children.

A. the excited            B. exciting               C. most exciting         D. the most exciting 

3.            the fiml is late , I will wait to watch it

A. Because                 B. Although            C. When                      D. But

4. Will robots look            the eldery and children ? 

A. for                          B. at                         C. into                        D. after 

Chọn từ có trọng âm khác 

    A. doctor    B. father  C.picture  D.fancy 

côn trùng có mấy kiểu biế thái . Viết sơ đồ  

bài 1 : Find the words whose bold part is pronounced differently from the rest

1 . A : idea                             B : hear           C : fear               D : bear

2.   B: provided                      B : visited         C : worked        D : decid

hãy nêu 5 biểu hiện về ý chí và nghị lực trong cuộc sống

Cho tam giác ABC, đường phân giác AD. Trên tia AC lấy điểm E Sao cho AE=AB. Chứng minh:

a) DB=DE

b) AD là đường trung trực của BE

tìm tất cả các giá trj của tham số m 2m - 3 sin x = 5 vô nghiệm 

tìm tất cả các giá trị của tham số m để phưowng trình cos  =3m + 1 có nghiệm