单项选择题

This will improve their working conditions and enable them to double the______.

A) goods
B) quantity
C) output
D) product
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单项选择题
I______ you had returned the book yesterday.
A) want
B) would rather
C) liked
D) had better
单项选择题
Jack lost his job a year ago and he ______another job yet.
A) has found
B) hasn't found
C) found
D) founded
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