We all need friends whom we can______ when we are in trouble.

A. call on                   B. break off               C. live on                   D. go by

When she left home, she had to do everything on her own.(fend)

=>.................................................................................................................... 

1.You (cook) ______ dinner. Just as it was ready, Chris and Jane phoned to say that they couldn’t come to eat.

2.I hope that I(finish) ______my report by lunch time.

3.I don’t understand how you got the wrong results. When I look over your notes, your chemistry experiment seem (perform)______ correctly. But something is wrong now.

4.There was a cold wind (blow)______in our faces when we were in the field.

5.He suggested that a petition(draw)______up.

6.I don’t mind her(appoint)______above me.

7.I’d rather(not/invite) ______ to the party with my parents because there was nothing interesting there.

8+9.When she found her dog(eat)______her birthday cake, she couldn’t but (kick)______ it out.

10.There(be)______ any errors, let me know.

Cho tam giác abc cân tại A, góc A bằng 20 độ, bc=2 cm. Tính AB 

Gợi ý: sử dụng kiến thức tỉ số lượng giác góc nhọn trong tam giác vuông