1 . 选词填空
1. ________ (Where, Who) we shall have the meeting is not known yet.
2. I don’t know ________ (how, that) I can finish my work so soon.
3. ________ (That, Whether) men have learned much from the behavior of animals is rarely new.
4. The fact ________ (why, that) most people believe nuclear war would be madness does not mean that it will not occur.
5. ________ (When, What) will happen is impossible to predict.
6. The teacher asked me ________ (whether, how) or not I finished my work.
7. It is estimated ________ (that, whether) a round trip flight to Mars would take more than a year and a half.
8. We all agree with your suggestion, but the question is ________ (why, who) is to put up the money for the activity.

2 . ________ I am anxious to know is ________ we can visit the Museum.

A．What; that

B．What; when

C．That; where

D．Where; when

5 . —The question is ________ it is that we can go for a picnic.
—I recommend a national forest park 18 miles away from here.

A．when

B．where

C．what

D．who