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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】As a physician who travels quite a lot, I spend much time on planes listening to that terrible “Is there a doctor on board?” announcement. I’ve been ___26___ only once-for a woman who had merely faint...
A.
For
B.
About
C.
But
D.
So