what does he usually have（）breaketfast
问题描述：
what does he usually have（）breaketfast
A.of B.at C.for D.in
Is your brother playing computer games He ()do
that because the computer doesn't work
A.may not B.can't C mustn't D needn't
答
1.for 提问三餐吃的什么一般都用for
2.B 由于其后很清楚地说明了电脑坏了,因此他不可能玩,表一定否认的推测应用cannot,而不用mustnot或其他