13．--Susan，do you know Maria？
--Sure．We         for nearly three years．（　�。�
A．have made friendsB．have been classmates
C．have joined the club   

分析 Susan你認識Maria嗎？當然了．我們成為同班同學已經將近三年了．

解答 答案：B．這道題考查的是"for+一段時間"和現(xiàn)在完成時態(tài)的延續(xù)性動詞連用．A，C選項的動詞都是短暫性動詞，都應該排除．B選項的動詞是延續(xù)性動詞，現(xiàn)在完成時態(tài)表示：過去發(fā)生的動作對現(xiàn)在造成的影響或結果或表示過去的動作或狀態(tài)持續(xù)到現(xiàn)在．主語+have/has+動詞的過去分詞．根據(jù)句意：我們成為同班同學已經將近三年了．（表示我當然認識她持續(xù)了將近三年．）應選：B．

點評 很多同學往往會忽略延續(xù)性動詞和短暫性動詞，這個在英語中分得很清，一定要特別注意．

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