You should work for __________ if you become an editor of the magazine.
A. just nine hours a dayB. no less than nine hours a day C. about ten hours a dayD. less than 25 hours a week

Helen loves to talk about travel. She _____ many places.A. has gone to B. has been to C. has gone for D. has been from

A.
A.

点击查看答案

红外线与可见光A．频率相等 B．波长相等C．都是电磁波 D．在真空中的传播速度不等

A.频率相等
B.波长相等
C．都是电磁波
C.在真空中的传播速度不等

点击查看答案