Ⅰ.单句语法填空
1．AIDS is said to_be (be) the biggest health challenge to man.
2．Study hard，and you will live up to your parents' expectations (expectation)．
3．The young man was persuaded to take up that job.
4．With nothing to_do (do)，she went out for a walk.
5．The reason why he failed was that he was too lazy.
6．They expected us to_hold (hold) together in an emergency like this.
7．I never thought of it，let alone did it.
8．We took a slightly (slight) more direct route.
9．When he was young，he received religious (religion) education.
10．We should be grateful to our parents，who provide us with food and clothes.
