A． , .
B．.
C． .
D． , .
参考答案：C
—Why do you always look so tired?
—Because our teachers us do a lot of homework after school.
A. make
B. want
C. ask
D. hope
（）灭火器不适用于电器设备火灾。
A.1211
B.泡沫
C.二氧化碳
D.干粉
