Cho hình thang ABCD (AB // CD). Gọi M, N, P, Q lần lượt là trung điểm của AD, BD, AC, BC. CM:

a. M, N, P, Q cùng nằm trên một đường thẳng

b. NP = \(\frac{1}{2}|DC-AB|\)

Correct mistakes:

If I had been ready when he called he would take me with him.

A B C D

Correct mistakes:

1. We should meet in a different place next time in case people will notice us together.

2. But for the presence of TV celebrity, the party won't have been a success.

3. If we don't control the growth of population, there will have been a population explosion soon.

Unless you _____ it carefully, you ______ sorry afterwards.

A. do - will feel B. did - would feel

C. had done - would have left D. have done - would feel

Choose the best answer to complete each of the following sentences:

1. If he _________ where he was going, he wouldn't have walked into the wall.

A. looked B. was looking

C. has looked D. had been looking

2. Tom ________ more if he _________ more time.

A. will read - has B. reads - will have

C. would read - had D. read - would have