题目内容
--Cathy’s parents have bought her a new house with a swimming pool.
--Really? It __________be very expensive.
A. can’t B. mustn’t C. must D. can
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题目内容
--Cathy’s parents have bought her a new house with a swimming pool.
--Really? It __________be very expensive.
A. can’t B. mustn’t C. must D. can