161、——Have you heard the new benefit system is to take effect?

　　——Yes. That’s great, yet some worry it may ____ laziness.

　　A、encourage B、develop C、cause D、prevent

　　162、——Excuse me, Professor Smith, I was wondering if I could leave a quarter earlier today.

　　——____.

　　A、Nothing the matter. B、Sure, go ahead C、Oh, why not? D、Of course, no problem.

　　163、——Look, it ____ again.

　　——yeah. This is the third snow we ____ this spring.

　　A、will snow; are having B、has snowed; had had C、is snowing; have had D、snows; have had

　　164、I invited five people to my party. Out of those five people, only John and Mary can come. ____ people can’t come.

　　A、The others B、The other C、Others D、Other three

　　165、If you think that the illness might be serious, you should not ____ going to the doctor.

　　A、put off B、put aside C、hold back D、hold up

　　166、It was only after some progress ____ in the use and development of electricity that men began to realize the importance and possibilities of magnetism.

　　A、was made B、would have been made C、has been made D、had been made

　　167、The central government is sparing no efforts to ____ the officials’ overuse of power to make up a healthier Party.

　　A、keep off B、keep down C、keep out D、keep on

　　168、Let’s go out now. It ____ any more.

　　A、didn’t rain B、doesn’t rain C、won’t rain D、isn’t raining

　　169、Why don’t you try on this jacket? It ____ nice on you.

　　A、looks B、looked C、will look D、has looked

　　170、——Do you have ____ trouble finishing the work?

　　——The work is not so different as you think. We have finished it already.

　　A、any B、no C、much D、some

　　171、It’s no ____ that he didn’t come.

　　A、difference B、importance C、relation D、matter