In the cross-lake swimming race, a boat will be ____in case of an emergency.
A. standing by B. turning on C. getting on D. running on
In the cross-lake swimming race, a boat will be ____in case of an emergency.
A. standing by B. turning on C. getting on D. running on
A
句意：有船只严阵以待，预防紧急情况。stand by 为不及物短语：to wait and be ready for action if needed 准备行动；待机；turn on 打开；get on进展；run down撞倒。根据句意，B 、C、D 三项均不符合。