单项选择题

The physical differences between men and women can be ______ directly to our basic roles as hunters and child-bearers.

A．pursued
B．traced
C．switched
D．followed
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单项选择题
Sadly, as spending on private gardens has ______, spending on public parks has generally declined.
A．heightened
B．lifted
C．flown
D．soared
单项选择题
（8）处应填写（）

A．before
B．while
C．until
D．when
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