单项选择题

I ______ to know about this.

A．was happened
B．happened
C．has happened
D．am happening
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单项选择题
A big fire ______ in that factory last night.
A．broke out
B．was broken out
C．has taken place
D．took place
单项选择题
I didn't go to the party, but I do wish I ______ there.
A．had been
B．were
C．was
D．went
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