单项选择题

It's generally agreed that fluctuations in birth rate are ______ to a number of economic factors.

A．entitled
B．attributed
C．confined
D．dedicated
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单项选择题
A great deal of ______ for our success should go to Michael Lee, head of our team.
A．merit
B．credit
C．favor
D．reward
单项选择题
The author claims that ______.
A．he wouldn't tolerate the vices that people have in common
B．he doesn't feel particular contempt for being untruthful
C．one may be tempted to untruthfulness when one comes to think of it
D．untruthfulness is a serious fault of character which he condemns strongly
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