（2013·北京卷)Experts believe people can waste less food by shopping only when it is necessary.
| A．why | B．where | C．that | D．what |
______ you are supposed to do ______ you don't like a thing is ______ it. Don't complain.
| A．That; what; change | B．When; that; to change |
| C．What; when;to change | D．What; that; changing |
When the young man was shown the evidence, he _______ and told everything he had done to the police.
| A．broke up | B．broke away |
| C．broke off | D．broke down |
The womanthere, in a blue shirt, is Lily’s teacher.
| A．seated ; dressing | B．seating ; dressed |
| C．sat ; dressed | D．sitting ; dressed |
_______ I went to the South Lake in Hanzhong, I was deeply impressed with its beautiful scenery.
| A．For the first time | B．The first time |
| C．At first | D．It was the first time |
Sheldon could have defeated Howard in the match, but he _______ too careless at the last minute.
| A．is | B．was |
| C．has been | D．had been |