—Isn’t that Ann’s husband over there? —No,it be him.I am sure he doesn’t wear glasses. A.can’t B.mustn’t C.won’t D.may not 答案:A 考查否定的推断。can’t不可能;must not不许;won’t将不会;may not可能不。根据“I’m sure he doesn’t wear glasses(我确信他不戴眼镜)”可知,说话者的态度是:不可能是他。 (1)计算:12-2sin60°-(5+2)0;(2)解方程:5x-1=3x+1.