考博考试

【单选题】 The last guests to reach the hotel ______ at 12 o'clock at night.
A．checked out
B．checked up
C．checked in
D．check on

网考网参考答案：C
网考网解析：
checked out付帐离开，检查；checked up调查，核对；checked in登记，报到；check on检查。 查看试题解析出处>>