单选题
4.
The helicopter ______ a light plane and both pilots were killed.
A、
coincided with
B、
tumbled to
C、
collided with
D、
stumbled on
【正确答案】
C
【答案解析】
A．与……一致；B．恍然大悟；C．和……相撞；D．无意中发现。
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