The author's explanation of how deep events occur would be most weakened if which of the following were discovered to be true？
A. Deep events are far less common than shallow events.
B. Deep events occur in places other man where crustal plates meet
C. Mantle rock is more ductile at a depth of several hundred kilometers than it is at 50 kilometers.
D. The speeds of both P and S waves are slightly greater than previously though.
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There are features of Western culture which are present in West Africa
A. This fact makes it easier to accept the unfamiliarity of West Africa
B. This fact makes West Africa seem even stranger.
C. This fact makes no difference to our reaction to West Africa.
D. This fact has been greatly overemphasized.
Which of the following statements best summarizes this passage？
A. When language is a barrier, people will find other forms of communication.
B. Everybody uses only one form. of Communication.
C. Nonlinguistic language is invaluable to foreigners.
D. Although other forms, apart from language of communication exist, they are of little value.
—What will happen at the meeting tonight？ —We are going to talk about the problem______at
A. was discussed
B. discussing
C. discussed
D. had been discussed
The author was kept awake by______.
A. a ghost
B. his friend
C. the witches
D. eerie feelings
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