31. As is well known, eating too much fat can_____heart disease and cause high blood pressure.
A. add to B. attend to
C. contribute to D. apply to
32. A club is a place to make frequent_____with friends.
A. accounts B. attempts
C. contents D. contacts
33. _____the obvious differences in size and population, the states of America have many things_____ common.
A. Although; on B. Though; in
C. Despite; in D. Because of; on
34. Scientists say it may be five or six years _____this medicine is tested on human beings.
A. since B. before
C. after D. when
35. With larger numbers of graduates than ever before, just having a degree will no longer be enough to make you _____in the crowd.
A. stand up B. stand by
C. stand for D. stand out
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