问题
选择题
In the swimming race, three boats will be ____in case of an emergency.
A．standing by
B．turning on
C．getting on
D．running on
答案
A
题意：有有三只船严阵以待，预防紧急情况。stand by 准备行动；待机；turn on 打开；get on进展；run down撞倒。
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