单项选择题

If someone "works around the clock," it means ______.

A．he likes his job
B．he works non-stop
C．he is very punctual
D．he repairs clocks and watches
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单项选择题
It can be inferred from the passage that all the work on the assembly line was ______.
A．dangerous and dull
B．harmful but beneficial
C．repetitive and dull
D．easy but tiring
单项选择题
In the sunlight, the coolest clothes would be ______.
A．yellow
B．black
C．green
D．white
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