单项选择题

The opportunity to explore and play and the encouragement to do so can ______ the performance of many children.

A．withhold
B．prevent
C．enhance
D．justify
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单项选择题
Successful learning is not a(n) ______ activity but consists of four distinct stages in a specific order.
A．only
B．sole
C．mere
D．single
单项选择题
We aim to ensure that all candidates are treated fairly and that they have equal ______ to employment opportunities.
A．entrance
B．entry
C．access
D．admission
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