If we _____careful ,fire can be very dangerous A.don't be B.are C.aren't D.won't be A不对么?
问题描述：
If we _____careful ,fire can be very dangerous A.don't be B.are C.aren't D.won't be A不对么?
答
ccccccccccccccccccccccccc
这个是一般情况下的事,如果我们不小心的话..
不用don't 啦,因为 在这样的语境中dont 需要跟着正常的动词,像if we don't treat fire carefully,it can be very dangerous.