单项选择题

More than one question（）discussed.

A、have been
B、has been
C、are
D、has

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单项选择题
Tom looked very much embarrassed when he was caught cheating in the exam（）the spot.

A、on
B、by
C、at
D、in
单项选择题
The tree, the branches（）are almost bare, is a very old one.

A、whose
B、in which
C、of which
D、which
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