单项选择题


A．efficiency
B．energy
C．time
D．money
<上一题 目录 下一题>
热门 试题

单项选择题
You ______ a tip if you're not satisfied with the service.
A．mustn't leave
B．must leave
C．can leave
D．don't have to leave
单项选择题
A．onB．throughC．withD．of
A．on
B．through
C．with
D．of
相关试题