He’s given me so much help that I really want to do something for him _____

_____ number of students in our class is 59.___ number of them get to school by bus.

You look puzzled at the news.— YesI just can’t imagine _____ he could have done such a thing

He spoke English so well that I took _______ for granted that he was an American

Let’s go for a walk，shall we?-It’s too late now；________，it’s beginning to rain.[ ]