问题：
His new neighborhood _ very quiet, but now it"s very noisy.
[ ]
A. was used to be
B. used to
C. is used to
D. used to be
His new neighborhood _ very quiet, but now it"s very noisy.
B. used to
C. is used to
D. used to be
[ ]
A. was used to be B. used to
C. is used to
D. used to be
参考答案：