give the correct form of the verbs 

1 I [study] english for four years

2 lan always [ get ] up late 

3 Minh [ buy ] a new dictionary yesterday

4 wearing casual clothes makes students [ feel ] more comfortable

5 I wish i [ be ] a millionauire

6 we [go] school 6 days a week

7 my father used to [ live ] in city 

8 you [ see ] the football match last night ?

9 this car [ buy ] last week 

10 you [ see ] our new english teacher yet ?

11 lan [ visit ] her grandparents next week 

12 my sister [ practice ] her music lesson now

13 I [ have ] these shoes since my 18th birthday

14 when I was young , I [phay ] badminton very well 

15 my mother some times [ buy ]  vegetables at this market

Hòa tan m gam SO3 vào 500 ml dung dịch H2SO4 24,5% (D = 1,2 g/ml) thu được dung dịch H2SO4 49%. Tính m gam SO3

IV. Supply the correct tense of the verbs in brackets

1. Everyday I ___________ (watch) TV , but yesterday I __________ (listen) to music.

2. What _______ she often ________ (have) for lunch?

3. Every morning, Linh ________ (get) up early.

4. Yesterday, I _____________ (not do) morning exercise because I  got up late.

5. What did you watch last night? – I _____________ (watch) the programme of “ English for kids” on TV.

6. We ______________ (visit) Bac Lieu windmill and had seafood at Huong Bien restaurant a week ago.

7. Our new house _______ (be) on Quang Trung street.

8. How did Lan go to her home village? – She _______ (go) there by bus.

9. My friend, Linda usually _______(have) noodles for breakfast.

10. ________ Akio _________(take) a shower  everyday?

Cho mình hỏi là có thể nhắn tin riêng cho nhau trên hoidap247 không ạ? Nếu có thì chỉ cho mình cách nhắn tin riêng không ạ???

một vật khi ở trong 1 chất lỏng (có d1 = 8100 N/m^3) thì nặng 24,9 N, khi ở trong nước (d2=10000 N/m^3) thì nặng 21,1 N. tính trọng lượng của vật

(x+1)(x^2+2x+4)-x^3-3x^2+16=0

cho các Oxit sau: K2O, MgO, Al2O3, P2O5, Fe2O3,Co, SO3. Những chất nào tác dụng được với: a, nước b, H2SO4 c, KOH

a) (-1584):(-2)^2-[126-(-3^2).(-2)^3]
b)-4^2+{-54:[(-2)^3+7.|-2|ư.(-2)^2}

Tìm m để f(x)=x^3-3mn^2+mx-4 có nghiệm x=2

89924424862x9=?

34244x90=?

34244x999=?

999x100=?