单项选择题

Research indicates that the birth-rate in some developed countries has been _________since 1980s.

A．descending
B．inclining
C．declining
D．lessening
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单项选择题
She refused to _________the door key to the landlady until she got back her deposit.
A．hand in
B．hand out
C．hand down
D．hand over
单项选择题
Any work undertaken on an individual basis should always _________attention on the broader social context in which the individual lives.
A．direct
B．focus
C．adjust
D．center
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