She looks very happy.She __have passed the exam A should B might C could—She looks very happy.She have passed the exam.-I guess so.It’s not easy after all.是easy不是difficult!A should B might C could D must

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She looks very happy.She __have passed the exam A should B might C could—She looks very happy.She have passed the exam.-I guess so.It’s not easy after all.是easy不是difficult!A should B might C could D must
She looks very happy.She __have passed the exam A should B might C could
—She looks very happy.She have passed the exam.
-I guess so.It’s not easy after all.是easy不是difficult!A should B might C could D must

She looks very happy.She __have passed the exam A should B might C could—She looks very happy.She have passed the exam.-I guess so.It’s not easy after all.是easy不是difficult!A should B might C could D must
D
这里只有must可以表示猜测
要是A should的话 原句的意思可以理解为"她竟然通过了考试" 但是回答I guess so就不对应了 所以不行

D ----表示猜测---一定,肯定

W我觉得哈,应该是D这里因为前面她很开心了,所以推断她肯定是通过了考试了,因为这个推断的可能性比较大,所以用must