39.Many people came to the meeting. Some were half an hour late.

A. Many people came to the meeting, some of who were half an hour late.

B. Many people came to the meeting, some of whom were half an hour. late.

C. Many people came to the meeting, but some of them were half an hour late.

D. Many people who came to the meeting some of them were half an hour. late.

Giải thích:

Whom thay thế chọn tân ngữ

40."Be careful when you cross the road, won't you?"

A. He says I will be careful when I cross the road.

B. He asked me if I would be careful when I crossed the road.

C. He told me to cross the road only when I was careful.

D. He warned me to be careful when I crossed the road.

Giải thích:

S+warned somebody+to V.