单项选择题

The Americans recognize that the UN can be the channel for greater diplomatic activity.

A．medium
B．place
C．resort
D．tunnel
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单项选择题
The newly elected president has pledged $13 million to the automobile industry for its survival.
A．prepared
B．promised
C．disposed
D．delivered
单项选择题
The applications of genetic engineering are abundant and choosing one appropriate for this case canbe rather difficult.
A．plentiful
B．sufficient
C．adequate
D．countable
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