单项选择题

Great efforts to increase wheat production must be made if bread shortages（）avoided.

A. will be
B. can be
C. are to be
D. were to be

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单项选择题
She resorted to （）when she had no money to buy foods for her children.

A. have stolen
B. steal
C. stole
D. stealing
单项选择题
(35)（）

A. think
B. thought
C. thinking
D. to think
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