单项选择题

He’ll never succeed， __________ hard he tries．

A．whatever
B．though
C．however
D．if
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单项选择题
He ran back into the room to see if he had __________ anything behind．
A．forgotten
B．laid
C．remained
D．left
单项选择题
__________ is more or less advanced Can pass this test.
A．That
B．Whom
C．whoever
D．Anyone
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