单项选择题

His attention often ______ at lectures. No wonder he failed the exam.

A．branched
B．wondered
C．wandered
D．went out
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单项选择题
My boss insists on seeing everything in ______ before he makes a decision.
A．black and blue
B．red and blue
C．black and white
D．green and yellow
单项选择题
Those gifts of rare books that were given to us were deeply ______.
A．appreciated
B．approved
C．appealed
D．applied
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