单项选择题

48()

A.hesitation 
B.surprise 
C.doubt 
D.delay

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单项选择题
(With) production (having gone) up steadily, the factory needs an (ever-increasing) supply (of) raw materials.()

A. With
B. having gone
C. ever-increasing
D. of
单项选择题
47()

A.best 
B.least 
C.length 
D.first
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