-David will win the first prize. -Are you sure?- . He is always working hard. [ ]A．It's my guess B．It's up to you C．That depends D．It's hard to say 题目和参考答案——青夏教育精英家教网—

题目内容

-David will win the first prize.
-Are you sure？
-________. He is always working hard.

[ ]

A．It's my guess
B．It's up to you
C．That depends
D．It's hard to say

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