第二部分英语知识运用（共两节，满分45分）
第一节：单项填空（共15小题；每小题1分,满分15分）
从 A、B、C、D 四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21．—Would you mind if I sat here?
— Sorry．_____ I'm expecting a friend．
A．Of course not． B．I'd rather you didn't C．Go ahead． D．Why not?
An unhappy childhood may have some negative effects on a person’s characters; however, they are not always_________,
| A．casual | B．ashamed | C．permanent | D．unfit |
––– Do you think it's a good idea to make friends with your students?
–––________, I do. I think it's a great idea.
| A．Generally | B．Eventually | C．Evidently | D．Actually |
When ______ different cultures, we often pay attention only to the differences without noticing the many similarities.
| A．compared | B．being compared | C．comparing | D．having compared |
My income is rather changeable, but I earn £73 a day ___________.
| A．on the other hand | B．in particular | C．on the whole | D．on average |
Nobody knows _______broke into the house last night and stole the important papers.
| A．who was it that | B．it was who that | C．who it was that | D．that it was who |