单项选择题

Fortunately, the bank clerk ______ press the alarm button before the robbers got away.

A．could
B．succeeded in
C．was able to
D．managed
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单项选择题
At each end of the tube ______ , one which gathers light and one which magnifies the image.
A．are two lenses there
B．two lenses are
C．are two lenses
D．two lenses are there
单项选择题
She is always fashionably dressed and looks ______ among the girls in plain clothes.
A．outstanding
B．conspicuous
C．unusual
D．distinguishing
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