按要求完成下列各句

1. They will return in a week.(对画线部分提问)

    __________ __________ will they return?

2. "Don't spend too much time on computer games."Mr.Wang said to Tony.(改为同义句)

    Mr. Wang __________ Tony __________ spend too much time on computer games.

3. Both Joy and Sam like singing Beijing Opera.(改为否定句)

    __________ Joy __________ Sam __________ singing Beijing Opera.

4. Nobody knows the answers.(改为反意疑问句)

    Nobody knows the answers, __________ __________?

5. You must hand in your history homework by the weekend.(改为被动语态)

    Your history homework __________ __________ __________ __________ by the weekend.

若视频图像每帧的数据量为6.4MB，帧速率为30帧/秒，则显示10秒的视频信息，其原始数据量为（）MB。

A．64

B．192

C．640

D．1920