Ⅰ.单句语法填空
1．Whose fault it is is quite clear now.
2．Whoever takes interest in the paper can ask for a copy.
3．When she will come back school depends(depend) on her mother.
4．It is uncertain whether his family was originally Britain or American.
5．What they want at present are(be) basic skills for survival in the wild.
6．It is desirable that we should read the instructions of the instruments in advance.
7．It is hard to imagine what life was like for her at that time.
8．It's important that children (should) have (have) their own hobbies and interests.
9．It is requested that all the members (should) be (be) present at the meeting tomorrow.
10．That theory must go hand in hand with practice is a principle we should always keep in mind.
