单选题
When the plane was flying up to the normal height, ______ and immediately the pilot had to fly it back to the airport.
A、
somewhere was on the blinks
B、
somewhere had a strange noise
C、
something became abnormal
D、
something was on edge
【正确答案】
A
【答案解析】
[解析] to be on the blinks这一习语本身来自飞机出现的“故障”，因此和fly back的结果吻合。
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