问题
选择题
The biggest room in this building _____ used as a meeting room. [ ]
A. used to
B. is used to
C. used to be
D. is used to be
答案
答案：C
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The biggest room in this building _____ used as a meeting room. [ ]
A. used to
B. is used to
C. used to be
D. is used to be
答案：C