Is this the problem ____the teacher explained last week ? Choose the wrong answer :
| A．which | B．that | C．/ | D．the one |
31. It is in the year of 2010 a severe drought hits Yunnan province.
| A．until | B．that | C．before | D．When |
30.Mr. Li arrived at the Wuguang train station twenty minutes ago, but the train to Guangzhou________yet.
| A．hadn’t come | B．won’t come | C．hasn’t come | D．didn’t come |
29. To pass the driving test, Alice had a busy month______driving the car.
| A．to practise | B．practising | C．practised | D．Practise |
28．How can they expect to learn anything________they never listen?
| A．when | B．until | C．unless | D．Though |
27．Only when_______senior high school________to show a great interest in poems.
| A．did I enter; did I begin | B．did I enter; I began |
| C．I entered; I began | D．I entered; did I begin |