20.this will not only keep the study habit alive but also keep you up to ___ on your class assignments and projects.

　　a. day b. date c. number d. time

　　21.i can‘t _____ the meaning of his poem because it’s too vague.

　　a. turn out b. put out c. figure out d. look out

　　22.some people think that animal research is irrelevant _ our health and that it can often produce misleading results.

　　a. with b. at c. on d. to

　　23. these networks are on the _____ for warning signs that show the weakening of rock layers that can precede an earthquake.

　　a. eagerness b. alarm c. alert d. guard

　　24. _____ it was raining， many international tourists were having picnics in the woods.

　　a. in spite b. in spite of

　　c. in spite of that d. in spite of the fact that

　　25. the students would not have made so much progress under less _____conditions.

　　a. popular b. welcome c. favorable d. prosperous

　　26.the party has failed to _____ the majority of voters that it is capable of governing the country.

　　a. trust b. credit c. convince d. believe

　　27. _____ driving around all day looking for somewhere to park，why don‘t you take a bus to town？

　　a. in spite of b. rather than c. in place of d. other than

　　28.the kids are _____ be hungry when they get home-they always are.

　　a. obliged to b. bound to c. desired to d. motivated to

　　29.all the characteristics that distinguish birds _____ other animals can be traced to prehistoric times.

　　a. to b. between c. for d. from

　　30.when the city was _____， everyone knew that total defeat was certain.

　　a. cut off b. cut down c. cut across d. cut out

　　31.in his composition there were no other errors _____ a few misspelled words.

　　a. beside b. except c. then d. than

　　32. is a phone conversation a good substitute _____a face-to-face talk？

　　a. for b. to c. of d. by

　　33. when we play a game， we enjoy what we are doing， _____ we should not play it.

　　a. instead b. otherwise c. nevertheless d. either

　　34. he asked julia to marry him but she _____ his proposal.

　　a. turned up b. turned on c. turned over d. turned down

　　35. he said he wouldn‘t _____what would happen next.

　　a. guarantee b. speculate c. oppose d. promise

　　36. the literary critics should be as _________ as possible in analysis and judgment.

　　a. positive b. negative c. subjective d. objective

　　37. it took a long time for her to _____ the fact that her husband was dismissed.

　　a. come up against b. come up to c. come up with d. come to terms with

　　38. as activity carried _____ as one thinks fit in one‘s spare time， leisure has several functions.

　　a. on b. out c. off d. over

　　39. the other timing system belongs in our internal clocks， which， left ___ would tie the body to a 25-hour rhythm.

　　a. behind b. alone c. out d. aside

　　40. it has been years _____i returned home.

　　a. after b. that c. since d. when