21.（C ） the look on his face,he doesn''''t quite understand what the speaker is saying.
A、A To judge by B、B Judge by C、C Judging by D、D To be judged by
22.Vocabulary,grammar rules,and cultural differences are all (D ) in learning a foreign language.
A、guarantees B、 means C、 media D、 barriers
23.Mr.Brown is not ( A) at the moment,please call him later.
A、available B、 present C、 busy D、 obtainable
24.The winning-team was(C ) with a silver cup.
A、won B、 offered C、 presented D、 gained
25.We shall be competing (B )sonic of the best teams in the country.
A、over B、 against C、 between D、 of
26.The president,along with his wife and daughter,( B) a visit to China.
A、are paying B、 is paying C、 pay D、 have been paying
27.The committee （B） her with the winner’s trophy for the sixth time.
A、A gave B、B presented C、C awarded D、D offered
28.It is requested that rent for the house ( D) in advance.
A、will be paid B、 should have to be paid C、 has to be paid D、 should be paid
29.There are many kinds of metals,(A ) .
A、each having its special properties B、 having its special properties C、 one has its special properties D、 each has its special properties
30.Never (C ) him in such a good mood.
A、 have found B、 I Find C、 have I found D、 found I
31.Sometimes earthquakes cause tidal waves and,（A） in the case of Japan,these can be dangerous.
A、A as B、B like C、C such as D、D just like
32.Never before ( D) felt himself so powerfully attracted to the creative idea.
A、he had B、 had he C、 he has D、 has he
33.Do you think he is (D )
A、the alive happiest man B、 the most happiest man alive C、 the happiest alive man D、 the happiest man alive
34.While driving along the treacherous mountain road,（D）.
A、A my right rear tyre blew out B、B my right rear tyre had a blowout C、C I had a blowout on my right rear tyre D、D I had my right rear tyre blow out
35.Another big issue （D） the new republic is the problem of the education of its citizens.
A、A confining B、B confirming C、C conforming D、D confronting
36.We had to pay the rent two weeks ( B).
A、go ahead B、 in advance C、 prior to D、 superior to
37.My brother seldom does his homework in the morning ,( C) .
A、so does Tom B、 Tom is too C、 nor does Tom D、 Tom doesn’t too
38.I went for a walk to (D ) the boredom of the day.
A、release B、relieve C、 believe D、 cease
39.By next Saturday George (B ) a whole month without smoking a cigarette.
A、will go B、 will have gone C、 has gone D、 has been going
40.You can’t imagine what she had gone ( C) before she made such great achievements.
A、along B、 around C、 through D、 by