单项选择题

Raising children, in the author's opinion, is______.

A．a moral duty
B．a thankless job
C．a rewarding task
D．a source of inevitable pain
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单项选择题
Niagara Falls is a great tourist ______ drawing millions of visitors every year.
A．attention
B．attraction
C．appointment
D．arrangement
单项选择题
I don't mind ______ the decision as long as it is not too late.
A．you to delay making
B．your delaying making
C．your delaying to make
D．you delay to make
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