The policeman watched a thief___ in to a building.

问题描述:

The policeman watched a thief___ in to a building.
A.go B.went C.to go D.A or B

如果答案选D 就是在watch后面接宾语从句,然后用过去式,这样也可以选went
watch sb do sth看到某人做某事,这时可以用go