金属武器探测器报警方式有（）。
A、部位显示
B、灯光报警
C、声响报警
D、自报警
参考答案：B, C
Your idea（想法） very good. [ ]
A. sounds
B. sees
C. hears
D. listens
— I have finished my homework.
— When ____ you ____ it?[ ]
A. have; finished
B. do; finish
C. will; finish
D. did; finish
