利用對比結構解題
對比結構常把兩種對立的事物或同一事物的兩個不同方面並列出來加以比較或對比。高考完形填空題常常利用句子之間的對比關係或者同一個句子的不同部分之間的對比關係設計題目。如：
A pupil who can do his homework in a quiet and___59___room is in a much better position than a pupil who does his homework in a small, noisy room with the television on.
59. A. furnished B. expensive C. comfortable D. suitable
【分析】本題利用相似短語之間的對比關係來命題。設空部分與下文的a small, noisy room with the television on存在對比關係。作者想藉此說明「相同的作業」對於「不同家庭背景的學生」所表現出的事實上的不公平。答案為C。
If he did not know them, he would greet them with a few words about the weather, ___15___ he did, he would ask about their families or make ___16___, always cutting his cloth ___17___ his customers.
15. A. and then B. and so C. even if D. but if
【解析】本題考查了相似句型的對比關係。空格處要填的部分與前部分if he did not know them形成對比，這句話的大意是說：如果店主認識那些顧客了，就會詢問他們的家庭或是開些玩笑。
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