10．---Jim is reading a book under that tree．
---It_____be Jim．He has gone to Hainan．（　�。�
A．mayB．mustn'tC．can't

分析 --Jim正在樹底下讀書．
--不可能是Jim，他去了海南了．

解答 答案：C．
結合選項可知本題考查情態(tài)動詞表推測，首先明確選項中每個單詞的意思：A：可能；B：不可以；C：不可能； 結合題干He has gone to Hainan推測句意是"不可能是Jim，他去了海南了．"，所以can't 符合句意，故選C．

點評 本題考查了情態(tài)動詞的用法．解答時首先根據(jù)題干明確句意，理解所給選項中每個情態(tài)動詞的意思并熟練掌握它們的用法，便可作出正確選擇．

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