名词性从句

1. What the doctors really doubt is _________ my mother will recover from the serious disease soon.

2. Her parents requested that she _______________ (have) a medical examination.

3. ________ the earth is round is known to us all.

4. _________ he said at the meeting astonished everybody present.

5. __________  we will hold a party in the open air tomorrow depends on the weather.

6. The reason is ________ he is unable to operate the machine.

7. He was ill yesterday. This is _______ he didn’t attend the meeting.

8. The suggestion ______ he raised at the meeting is very good.

9. The suggestion ______ the students should have plenty of exercise is very good.

10. Energy is _______ makes  things  work.