单选题
Which of the following is NOT true about Charlie's work?
A、
Charlie had to commute to his workplace.
B、
Charlie could get some tips by serving others.
C、
Operating elevator was Charlie's main duty.
D、
Whistling for cabs was part of Charlie's regular work.
【正确答案】
D
【答案解析】
从第三段最后一句得知，帮住户叫出租车是门房的职责，因为门房生病了，Charlie才替他做这件事，因此选D。
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