单选题
THE AIRPORT EXPRESS DEPARTS FROM PLATFORM 3
EVERY 20 MINUTES DURING THE DAY
(EVERY 30 MINUTES AT NIGHT)
A、
The train service to the airport runs 24 hours a day.
B、
Airport trains leave Platform 3 at 20 minutes past the hour.
C、
The airport express takes half an hour at night.
【正确答案】
A
【答案解析】
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