问题
选择题
They could see nothing because the lights suddenly _______.
A．went on
B．went over
C．went down
D．went out
答案
答案：D
题目分析：句意：他们什么也看不见，因为灯突然熄灭了。Go on继续；go over重温，过一遍；go down沉下; 下去；go out出去，熄灭。所以选D。
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