题目内容
—It's difficult for the village children to cross the river for school.
—I think a bridge __________over the river.
—I think a bridge __________over the river.
[ ]
A. should be built
B. is being built
C. has been built
D. was built
B. is being built
C. has been built
D. was built
A
练习册系列答案
相关题目