— What ___________ it?
— It's a cat. [ ]
A. are
B. is
C. do
D. does
答案：B
I don’t mind ____________ I can win or not , but I will try my best .
A．when
B．where
C．whether
D．how
煤壁“挂红”现象，一般是接近（）的征兆。
A、老空水
B、地表水
C、采空水
