A-A+
They ______ at the hotel in less than half an
问题详情
They ______ at the hotel in less than half an hour after their arrival at the airport.
A．checked out
B．checked on
C．checked up
D．checked in请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：D
解析：check in在旅馆登记。check out付账后离开。check up检查。check on检查，核对。
