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单选题
As the plane flew off towards the mountains in the distance the sound of its engines gradually ______.
A
died away
B
sank down
C
dropped off
D
went out
参考答案
参考解析
解析：
随着飞机飞向远处的山脉，引擎的声音逐渐消失。die away渐息，渐弱。sink down沉落。drop off离开，散去；逐渐减少。go out出去；熄灭；过时。
随着飞机飞向远处的山脉，引擎的声音逐渐消失。die away渐息，渐弱。sink down沉落。drop off离开，散去；逐渐减少。go out出去；熄灭；过时。
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共用题干
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