13．Is this the reason         he gave us for the delay of the project？（　　）
A．howB．whatC．whyD．that

分析 這就是他給我們的推遲這項(xiàng)計(jì)劃的理由嗎？

解答 答案：D
題干中he gave us for the delay of the project是修飾reason的一個(gè)定語從句；從句中g(shù)ive缺少賓語（give sb sth），要用關(guān)系代詞．故選D．

點(diǎn)評(píng) 定語從句是用來修飾名詞的形容詞性從句，相當(dāng)于一個(gè)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(gè)判斷方法．

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