选择Look!Abig bridge___over the river.A.be built B.has been built C.is being built

问题描述:

选择Look!Abig bridge___over the river.A.be built B.has been built C.is being built

C、
一般look出现表示动作正在发生.
A绝对不可能的.B是现在完成时,时态不太对.排除下来只有C了.