单项选择题

You must ______ at the airport an hour before your plane leaves.

A．check in
B．check out
C．check up
D．check on
<上一题 目录 下一题>
热门 试题

单项选择题
The novel Pride and Prejudice is a favorite ______ my sister. She has read it for five times.
A．of
B．with
C．to
D．for
单项选择题
The police suspected that the sectary might be ______ of the murder.
A．guilty
B．conscious
C．careful
D．impatient
相关试题