答案：should have helped　考查情态动词的用法。根据句意可知，此处表示“一种惊讶”，且是对过去发生的事情感到惊讶，故填should have helped。

　　Part Ⅱ.语篇语法填空(重点考查情态动词和虚拟语气)

　　Susan: Larry, how soon shall we arrive in Toronto?

　　Larry: If we don't make any more stops, we __1__ be there by nightfall.

　　Susan: What? By nightfall? I am starving to death. __2__ we stop and find something to eat?

　　Larry: Actually, we have a free dinner waiting for us at the hotel in Toronto.

　　Susan: I know, but I __3__ stand the hunger any more.

　　Larry: You know me, Susan. I don't like to spend money. Sorry.

　　Susan: Yeah, you are really cheap! If you __4__ so cheap, we __5__ (fly) to Thailand for our vacation instead of driving to Toronto.

　　Larry: Thailand? Don't be ridiculous! Even if I weren't cheap, you know we __6__ afford to go that far away for vacation!

　　Susan: Well, you __7__ afford a stop for food, right?

　　Larry: If we do, we __8__ waste time, gas, and money. I think we __9__ just wait until we get to Toronto. Oh, hey, I remember you are fond of candy. I think I __10__ have some of that candy you like in my backpack.

　　Susan: Candy? Great!

　　1．________　2.________　3.________　4.________

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