1．It is from May 1to October 31，2010__________the World Expo 2010Shanghai will be held，________is a great event for the Chinese people．（　�。�
A．when； thatB．that； whenC．which； whenD．that； which

分析 2010年上海世博會將在2010年五月一號到十月三十一號舉行，這對中國人來說將是一件盛事．

解答 答案：D
題干中第一個空是強調(diào)句型，即對the World Expo 2010Shanghai will be held from May 1to October 31，2010中的時間狀語from May 1to October 31，2010進行強調(diào)，要用that來連接；句中is a great event for the Chinese people修飾前面整個句子內(nèi)容，是一個非限制性定語從句；從句中缺少主語，且指代的是一件事，要用which來引導(dǎo)．故選D．

點評 定語從句是用來修飾名詞的形容詞性從句，相當(dāng)于一個形容詞．連接定語從句的引導(dǎo)詞分為關(guān)系代詞和關(guān)系副詞，關(guān)系代詞在從句中要作主語或賓語；關(guān)系副詞在從句中作狀語．這也是選擇關(guān)系詞的一個判斷方法．

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