单项选择题

The survey showed that ______ numbers of 15-year-olds were already smoking twenty cigarettes a week.

A．essential
B．steady
C．primary
D．substantial
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单项选择题
His desire to ______ other people has caused trouble in his family.
A．please
B．dominate
C．force
D．urge
单项选择题
The destruction of rainforests has been ______ as a disaster for the environment.
A．blamed
B．declared
C．condemned
D．claimed
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