单项选择题

Shoes are often()when they are new.

A. staff
B. stuff
C. stiff
D. stuffy

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单项选择题

I promise to look () the matter as soon as I get back to the head office.

A. into
B. in
C. for
D. after

单项选择题

The flood did not start to()until two days after the rain had stopped.

A. retire
B. recede
C. shrink
D. retreat

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