问题
选择题
The number of private cars in Xi'an is increasing day by day, so I think more new roads need ______.[ ]
A. building
B. to build
C. to be built
D. A and C
答案
答案：D
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The number of private cars in Xi'an is increasing day by day, so I think more new roads need ______.[ ]
A. building
B. to build
C. to be built
D. A and C
答案：D