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【单选题】

Many tents as well as food, water and medicine _________ to Yushu.

A.
have sent
B.
have been sent
C.
has sent
D.
has been sent
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参考答案:
参考解析:
.
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举一反三

【单选题】Try to spend your time just on the things you find _______.

A.
worth doing them
B.
worth being done
C.
worthy of ding them
D.
worthy of being done