填空题


It is ____________.

【参考答案】

helpless
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单项选择题
A small population may mean ______.
A．higher productivity, but a lower average income
B．lower productivity, but a higher average income
C．lower productivity, and a lower average income
D．higher productivity, and a higher average income
填空题
We children are not fond of ______ (watch) adult films.
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