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Mrs. Pike, ______, is nice and helpful.
______, the national holiday of Ireland, is generally celebrated on March 17.
The ______ can be borrowed from the ______
He took the dictionary from ______
______ they succeed in their project?
_______ the bus? - At the bus stop over there.
______ is their child? - Five.
The concert was cancelled ______ we went to a night club instead.
I wanted to sit in the front of the balcony ______ I ordered my tickets early.
We are going out to eat ______ we finish taking the test.
I wonder how Sam ______ such a selfish person.
Her little boy is so imaginative. He can ______ stores himself.
______! The street is wet and slippery.
To an outsider, the economics of this country ______ in disarray.
Politics ______ something too difficult for me to understand.
Four years ______ a long time to spend away from your friends and family.
While the problem seems overwhelming, even ______ money can make a difference.
We keep ______ in the cupboard.
She keeps ______ in the refrigerator.
Take your time. You ______ back before eight.
The lady you met yesterday ______ Mary. I am sure that she has gone to London for two weeks.
I want a new house. It ______ have a swimming pool, but it ______ have a nice garden.
The apples ______ all summer and now they ______ They look delicious.
Someone ______ the cake before I ______
I ______ no difficulty in learning Russian since I ______ to learn it 3 years ago.
Curtis delayed ______ the airplane because the weather was bad.
I will make a note in my diary so that I will remember ______ you the information you need.
There is nothing wrong with the photocopier. It just needs ______
At the time being, many products are nearly identical ______ one another ______ quality and price.
The search ______ alternative sources ______ energy has led in various directions.
Nowadays people become aware ______ secondhand smoke.
By ______, we often go to pagoda on New Year’s Day.
Without our ______, they would not have got accomplishment.
Sulphur dioxide is a ______ that is released into the atmosphere by coal-fired power stations.
Cho tam giác ABC có A’, B’, C’ lần lượt là trung điểm của BC, CA, AB.
a) Chứng minh: \(\overrightarrow {B'C'} = \overrightarrow {CA'} = \overrightarrow {A'B} \).
b) Tìm các vectơ bằng \(\overrightarrow {B'C'} ,\overrightarrow {C'A'} \).
Cho đường tròn (O;R) và điểm A cố định ngoài đường tròn. Vẽ đường thẳng d vuông góc với OA tại A. Trên d lấy M. Qua M kẻ tiếp tuyến ME, MF với (O). Nối EF cắt OM tại H, cắt OA tại B. Chứng minh:a) Tứ giác ABHM nội tiếp.b) OA.OB = OH.OM = R2.c) Tâm I của đường tròn nội tiếp tam giác MEF thuộc một đường tròn cố định khi M di chuyển trên d.d) Tìm vị trí của M để diện tích tam giác HBO lớn nhất.
Cho hình chóp S.ABC có đáy ABC là tam giác đều cạnh a biết SA vuông góc với đáy, SA hợp với (SBC) một góc 45°. Tính thể tích hình chóp S.ABC.
Cho các số 13,1; 13,01; 1,30.103; 1.3.10–3. Có mấy số có ba chữ số có nghĩa?
Cho α là góc tù và sinα – cosα = \(\frac{4}{5}\). Giá trị của M = sinα – 2cosα là ?