例題4(1997年8月考試試題)Unlike fossil fuels, which can be used only once, wind and solar power _____of energy.(A) for renewable sources(B) the sources are renewable(C) are renewable sources(D) renewable sources這里,句子的主干應該是wind and solar power____ of energy.Unlike fossil fuels表示比較,做狀語。而which引導的從句which can be used only once修飾fossil fuels.大家將4個選項分別代入句子主干的空格中,得(A) wind and solar power for renewable sources of energy選項A沒主語,即沒完整的主謂結構。(B) wind and solar power the sources are renewable of energy非常明顯,這也不可以構成一個完整的有意義的句子。(C) wind and solar power are renewable sources of energy這個選項比較合適,由于主謂齊全,而且以名詞sources結尾,讓介詞短語of energy修飾。(D) wind and solar power renewable sources of energy非常明顯,這也不可以構成一個完整的主謂結構。所以,正確答案是C?例題5(1997年8月考試試題)Today _____ of the Earth live on a very small percentage of the Earth's land surface.(A) about two-thirds populated(B) the population is about two-thirds(C) about two-thirds of the population(D) of about two-thirds the population is第一,剖析句子結構。依據句子的大意,動詞live應該是主句的謂語動詞。空格填入的應該是句子的主語,而a very small percentage of修飾限定the Earth's land surface.大家簡化這個句子,得出句子主干_____ live on the Earth's land surface.空格內應該填入名詞或者名詞短語。4個選項中,只有C是明顯的名詞短語,代入后也符合句意。選項A中的populated不論是做定語還是謂語都不符合句意。而選項B和D都是帶有助動詞的主謂結構,當然不可以填入只缺主語的句子中。所以,正確答案是C.?例題6(1997年8月考試試題)Following the guidelines for speaking and voting established by the book Robert's Rules of Order, _____during meetings.(A) and avoid large decision-making organizations' procedural confusion(B) large decision-making organizations avoid procedural confusion(C) is procedural confusion avoided by large decision-making organizations(D) are avoiding procedural confusion in large decision-making organizations第一,大家剖析following將來空格以前句子的成分。其中的established by the book Robert's Rules of Order和for speaking and voting都修飾the guideline.所以,大家可以將空格前的成分簡化為following the guidelines.那樣這個時候,原句成為Following the guidelines, _____ during meeting.和例題3一樣,following the guidelines不是做定語(隨著狀語)就是做謂語。假如它做定語,后面需要帶自然語序的主謂結構;假如它做謂語,后面需要帶倒裝的主謂結構。由此,大家排除帶有and的選項A.依據句意(guidelines和confusion的意思)大家又可以排除選項C.這個時候,大家只剩下選項B和D.選項D是主謂倒裝的結構,填入后主語應該是avoiding procedural confusion,謂語動詞是are.非常明顯,avoiding procedural confusion后應跟單數謂語動詞。所以D也錯,只有B才可能是正確答案。代入句中,符合句意。?例題7(1997年8月考試試題)Because it was so closely related to communication, _____ art form to develop.(A) drawing was probably the earliest(B) to draw early was probably(C) early drawing probably(D) the earliest draw.第一,大家剖析句子結構??崭袂笆莃ecause引導是什么原因狀語從句,也就是說,_____art form to develop應該是完整的主謂結構。而單數的art暗示它應該是修飾名詞form,不定式to develop做補語。所以,空格內應填入完整的主謂結構。這個時候,大家可以排除選項C和D,剩下選項A和B.仔細對比選項A和B,大家發現選項A更符合句意,由于drawing這個名詞(畫)才可能是一種藝術形式(art form),而動作to draw不可能是一種藝術形式。所以,正確答案是A。