KS8S型矿灯灯头内保险断电装置是防止井下()爆炸用的。
A、煤
B、瓦斯
C、水
参考答案:B
Ma Dong didn't write out the right answer, _____. [ ]
A. neither did I
B. neither didn't I
C. I'm too
D. either I
Speaker A: That was a great dinner. Thanks a lot. You'll have to come to our place sometime.Speaker B: ______
A.I'm really very sorry. You see, I haven't prepared anything delicious for you.
B.Come again whenever it is convenient to you, won't you
C.Why do you have to leave in a hurry Do you have anything urgent to do
D.I'm glad you enjoyed it. Hope to see you again soon.