--- She looks very thrilled. She have passed the exam. --- I guess so. It is a very import

问题补充：

--- She looks very thrilled. She have passed the exam.

--- I guess so. It is a very important exam after all.

A. should

B. could

C. must

D. might

答案：

A. should

B. could

(答案→)C. must

D. might

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