问题
选择题
I was out of town at the time，so I don’t know exactly how it ________.
A．was happening
B．happened
C．happens
D．has happened
答案
答案：B
由前半句可知“事情”发生在过去，而不强调对现在的影响，故用一般过去时。
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I was out of town at the time，so I don’t know exactly how it ________.
A．was happening
B．happened
C．happens
D．has happened
答案：B
由前半句可知“事情”发生在过去，而不强调对现在的影响，故用一般过去时。