17．The other day Jack was in _________ people call a moral dilemma as to whether to help the old man who fell off his bike．（　　）
A．thatB．howC．whichD．what

分析 句意：那天杰克處在一個(gè)人們叫作道德兩難的出境關(guān)于是否要幫助那個(gè)從自行車上摔下的老人．

解答 答案：D 此處是一個(gè)兼詞，既引導(dǎo)表語從句，又在從句中做賓語，只有what由此功能．故選D項(xiàng)．

點(diǎn)評(píng) 考查表語從句的連接詞．做此類題目，要根據(jù)句意判斷連接詞，再看看是否在從句中做成分．

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