单项选择题

"Where can I find Jim" "He is ______ his work. He won' t leave the lab until 6:00 p. m."

A．on
B．over
C．at
D．under
<上一题 目录 下一题>
热门 试题

单项选择题
We find that some birds ______twice a year between hot and cold countries.
A．transfer
B．migrate
C．commute
D．mobilize
单项选择题
It is well known that knowledge is the ______condition for expansion of mind.
A．incompatible
B．incredible
C．indefinite
D．indispensable
相关试题