Darwin counted 225 flowering plants, ______ he collected and brought home 193.

　 A. which　 　　　B. for which　 　　　　　 C. in which　 　　　D. of which

Nowadays，a graduate with a master’s degree________fail to find a high?paid job，which discourages a lot of college students.

A．shall B．can　 C．will D．must

I would have helped you, but I 　　　__ really occupied the whole week．

　 A．was　　　　 B．am　　　　　 C．had been　　　 　　　　 D．were

He 　　　　 (经常)refers to the professor when meeting with difficulty..

如果因故不能参加考试,你必须提前通知老师。(in advance)?

____ the pressure from work, teachers have to deal with psychological problems caused by interpersonal relationship.

A、As far as B、As long as C、As well as D、As soon as

— ____ that you came here yesterday?

　 — By train.

　 A. How it was B. How was it 　 　 C. How were you　　 D. How are you

The secretary worked late into the night, a _______ long speeeh for the president.

A. to prepare　 　B. preparing　　

C. prepared　　 　D. was preparing

The door and the windows were all closed and there was no ______ of forced entry.

　 A. scene　　　　　 B. show　　　　　　 C. sign　　　　　 D. sight

I don’t mind _____(道歉) to others if I make a mistake.