情态动词的区分问题

-- _________ I do the exam this year or next year? What do you think?

-- Next year would be better.

A. Can B. Must C. Need D. Should

怎么感觉这四个选项都可以？求指点。

线索在回答部分Next year would be better.

提问人显示问this year or next year的选项，而A,B,C都停留在“许可”层面，故选D，能表达征求意见。

mikee -

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