单项选择题

______ he arrived at the spot, he realized what had happened there.

A．The moment when
B．The moment
C．Until
D．At the moment
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单项选择题
______, he was fully aware of its importance.
A．A child as he was
B．Child as he was
C．Child although he was
D．A child though he was
单项选择题
Don't forget to bring a ______ with you to dust the furniture.
A．clothes
B．clothing
C．garment
D．cloth
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