单项选择题

Not only those students but also the teacher ______ something about the matter.

A．know
B．knowing
C．knows
D．known
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单项选择题
Fire ______ in a neighbouring street but ______ soon.
A．broke out; put out
B．broke out; was put out
C．was broken out; put out
D．was broken out; was put out
单项选择题
There are some differences between the two. I really don't know ______.
A．where to choose
B．which to choose
C．to choose what
D．to choose which
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