Can you tell me ________.

[　　]

A．who is that gentleman

B．that gentleman is who

C．who that gentleman is

D．whom is that gentleman

Since we ________, we didn't find the trip too tiring.

[　　]

A．made turns to drive

B．took turn driving

C．made turns driving

D．took turns driving

Either you or the headmaster ________ the prizes to those gifted students at the meeting.

[　　]

The number of people invited ________ fifty, but a number of them ________ absent for different reasons.

[　　]

Mr. Read made up his mind to devote all he had to ________ some schools for poor children.

[　　]

________ she couldn't understand was ________ fewer and fewer showed their interest in her lessons.

[　　]

He asked ________ for the violin.

[　　]

Neither you nor I ________ to do that.

[　　]

If I had ________, I'd visit Europe, stopping at all the small interesting places.

[　　]

Someone called me up in the middle of the night, but they hung up ________ I could answer the phone.

[　　]