单项选择题

Mr. Smith used to smoke ______ but he has given it up recently.

A．roughly
B．heavily
C．seriously
D．hardly
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单项选择题
Which organization was the first to study the impact of mobile phones on health
A．The International GSM Association.
B．The International Agency on Research on Cancer.
C．The Dutch technological research institute.
D．The 3G research organization.
单项选择题
What do old people think of crossing the overhead bridges
A．They like the idea of building overhead bridges.
B．They have no difficulty using overhead bridges.
C．They think the overhead bridges are too expensive to build.
D．They find overhead bridges somewhat inconvenient to use.
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