凡临时用电超过（）个月以上的，应按正式线路架设。
A、3
B、5
C、6
参考答案：C
The teacher ________ his work.
A．strict with
B．strict in
C．is strict with
D．is strict in
We can buy the book______ a very good price. [ ]
A. in
B. on
C. to
D. at
