单项选择题

Tom could hardly ______ his excitement as he knew that he had made a real discovery.

A．conceal
B．reveal
C．show
D．discover
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单项选择题
She ______ the high unemployment figures as evidence of the failure of the government policy.
A．cited
B．recited
C．listed
D．lifted
单项选择题
We must try to ______ the best of our moral values for our children and grandchildren.
A．replace
B．remain
C．generate
D．preserve
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