【B1】
A. what
B. which
C. where
D. how
The author of this article_____.
A. believes that the social sciences have become unimportant and unnecessary
B. believes that the social sciences are faced with too many problems
C. speculates that the use of the social sciences may be better
D. considers the social sciences hostile to progress
【B4】
A. city
B. urban
C. suburban
D. countryside
A beam of light will not bend round the corners unless ______ to do so with the help of a
A. being done
B. made
C. to be made
D. having made
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