单项选择题
When I told the manager I didn't have the goods I had ordered delivered on time, he promised to
investigate
my complaint.
A．look into
B．look through
C．look after
D．look over
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单项选择题
I'm very sorry to have bothered you with so many questions on such an occasion.
A．interfered
B．offended
C．impressed
D．concerned
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单项选择题
The ship's generator broke down, and the pumps had to be operated by hand.
A．manually
B．artificially
C．automatically
D．synthetically
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