单项选择题

As far as children are concerned, second-hand smoke can only have bad effects on them.

A．孩子们担心买二手烟会对他们有坏的影响。
B．就孩子们而言，被动吸烟仅仅对他们有一点影响。
C．对孩子们而言，被动吸烟危害很大。
D．对孩子们而言，被动吸烟对他们只有坏的影响。
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单项选择题
Jacky White didn't know exactly the reason ______.
A．why the goods were not satisfactory
B．why the goods didn't arrive in time
C．why the goods were late
D．why Mr. Bush was in trouble
单项选择题
Jacky White's situation was ______.
A．he had no goods to sell
B．the customers no longer trusted him
C．he couldn't earn money and lost his old customers
D．he had to close his store
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