问题
选择题
I was out of town at thetime, so I don't know exactly how it ____. [ ]
A. was happening
B. happened
C. happens
D. has happened
答案
答案:B
I was out of town at thetime, so I don't know exactly how it ____. [ ]
A. was happening
B. happened
C. happens
D. has happened
答案:B