单项选择题

The time will come ______ man can fly to outer space at his leisure.

A．that
B．when
C．in that
D．which
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单项选择题
You don't object ______ you by your first name, do you
A．for me to call
B．me to call
C．to my calling
D．my calling
单项选择题
Some social workers think that ______ .
A．health and safety are more important than personal freedom
B．personal freedom is more important than health and safety
C．old people should keep their rooms clean
D．one should not take risks dealing with old people
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