单项选择题

Yesterday when I was walking on the street, I ______ to see an old friend of mine.

A．managed
B．happened
C．settled
D．occurred
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单项选择题
I had hoped that I ______ the lecture on American Romanticism.
A．attend
B．attending
C．could attend
D．can attend
单项选择题
Here ______ a pen, a few envelopes and some paper for you.
A．is
B．are
C．be
D．being
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