题目内容
Congratulations ________ your success ________ entering Tsinghua University.
[ ]
A.on; on
B.on; in
C.in; in
D.in; on
答案:B
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Apples are usually sold by ________ weight, and eggs are sometimes sold by ________ dozen.
[ ]
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A.the; the |
B./; a |
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C./; the |
D.the; a |