Ⅰ.单句语法填空
1．People shouldn't drop litter on the pavements, __should__ they?
2．You found the key in the bedroom, __didn't__ you?
3．You'd better change your wet skirt, __hadn't__ you?
4．Everybody knows the answer, don't __they__？
5．__There__ wasn't enough time at that moment, was there?
6．Jenny __doesn't__ think that Robert is honest, does she?
7．The problem __was__ difficult for him, wasn't it?
8．Some plants never blossom, __do__ they?
9．Mary thinks you will come to the party，__doesn't__ she?
10．That he didn't pass the exam made his parents very angry，didn't __it__？
