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It is a good idea to ask for a map at the information center, may prove to be very useful before you start your tour of the museum. A. where B. which C. who D. that 【查看更多】

 

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It is a good idea to ask for a map at the information center,_____ may prove to be very useful,
Before you start your tour of the museum.

[     ]

A. where
B. which
C. who
D. that

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It is a good idea to ask for a map at the information center,        may prove to be very

useful before you start your tour of the museum.

A. where B. which C. who    D. that

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