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The police still haven’t found the lost child, but they are doing all they .( )

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The police still haven’t found the lost child, but they are doing all they .( )

The police still haven’t found the lost child, but they are doing all they _______.（ ）

A. can B. may　 C. must D. should

 

试题答案

A

 

标签：thefoundchildlostpolice

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