In order to find the missing child,villagers ________ all they can over the past five hours.(2012·安徽)
A.did | B.do |
C.had done | D.have been doing |
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In order to find the missing child,villagers ________ all they can over the past five hours.(2012·安徽)
A.did | B.do |
C.had done | D.have been doing |