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【单选题】
His hard work ______ when he won the prize.
A.
paid off
B.
showed of
C.
rang off
D.
kept off
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】They always give the available information to（）comes first.
A.
who
B.
whomever
C.
whoever
D.
whom
【单选题】Elephants can be used to do some heavy jobs because______.
A.
they can eat a lot
B.
they are very heavy, too
C.
they are very strong