21.(2008北京) — Did you return Fred’s call?
— I didn’t need to __________ I’ll see him tomorrow.
A. though B. unless C. when D. because
答案：D
解析：本題考查狀語(yǔ)從句。從句為原因狀語(yǔ)從句，選D，因?yàn)槲颐魈炀鸵匆娝?，所以沒必要給Fred回電話。

22.(2008北京) I’m sorry you’ve been waiting so long, but it’ll still be some time __________ Brain gets back.
A. before B. since C. till D. after
答案：A
解析：本題考查狀語(yǔ)從句。本題使用了it will be + 一段時(shí)間 + before +狀語(yǔ)從句，表示“在……之前還需要一段時(shí)間，一段時(shí)間之后發(fā)生某事”。后面句子的含義：不過Brain還要過一會(huì)兒才能回來。

23.(2008天津) We’ll have a picnic in the park this Sunday __________ it rains or it’s very cold.
A. since B. if C. unless D. until
答案：C
解析：考查狀語(yǔ)從句的引導(dǎo)詞。句意“除非太冷或天太冷，否則我們本周就到公園野餐”，unless引導(dǎo)一個(gè)表示否定意義的條件狀語(yǔ)從句。

24.(2008福建) Nancy enjoyed herself so much __________ she visited her friends in Sydney last year.
A. that B. which C. when D. where
答案：C
解析：考查狀語(yǔ)從句。根據(jù)題干意思可知，此處是時(shí)間狀語(yǔ)從句，選C。

25.(2008全國(guó)I) — Have you got any idea for the summer vacation?
— I don’t mind where we go __________ there’s sun, sea and beach.
A. as if B. as long as C. now that D. in order that
答案：B
解析：as if表示“仿佛，好像”，引導(dǎo)方式狀語(yǔ)從句，now that表示“既然”，引導(dǎo)原因狀語(yǔ)從句；in order that表示“為了”，引導(dǎo)目的狀語(yǔ)從句；as long as表示“只要”，引導(dǎo)條件狀語(yǔ)從句。依句意可知，答話者不介意去任何地方，只要那里有陽(yáng)光、大海和海灘。

26.(2008山東) He found it increasingly difficult to read, __________ his eyesight was beginning to fail.
A. though B. for C. but D. so
答案：B
解析：考查分句邏輯關(guān)系判斷和連詞辨析。由語(yǔ)境可知，后一個(gè)分句“視力開始下降”是前一個(gè)分句“讀書越來越困難”的原因，所以用for引導(dǎo)原因狀語(yǔ)從句。干擾性最大，但其后要跟結(jié)果狀語(yǔ)從句，所以應(yīng)該排除。Though引導(dǎo)讓步狀語(yǔ)從句，but引導(dǎo)轉(zhuǎn)折關(guān)系的分句。

27.(2008遼寧) __________ hungry I am, I never seem to be able to finish off this loaf of bread.
A. Whatever B. Whenever C. Wherever D. However
答案：D
解析：hungry為形容詞，whatever常用來修飾名詞；依句意：無(wú)論我多么饑餓，我看起來永遠(yuǎn)也不會(huì)吃完這塊面包，可知答案為D。

28.(2008遼寧) I used to love that film __________ I was a child, but I don’t feel it that way any more.
A. once B. when C. since D. although
答案：B
解析：once用作連詞，表示“一旦”，引導(dǎo)條件狀語(yǔ)從句；when表示“當(dāng)……的時(shí)候”，常引導(dǎo)時(shí)間狀語(yǔ)從句；since表示“從……以來”，引導(dǎo)時(shí)間狀語(yǔ)從句，還可以表示“既然”，引導(dǎo)原因狀語(yǔ)從句；although表示“盡管”，引導(dǎo)讓步狀語(yǔ)從句。

29.(2008四川) I haven’t seen Ann for __________ long that I’ve forgotten what she looks like.
A. such B. very C. so D. too
答案：C
解析：此處是“so … that”結(jié)構(gòu)，表示“如此……以至于”。A項(xiàng)用來修飾名詞。

30.(2008四川) There are some chairs left over __________ everyone had sat down.
A. when B. until C. that D. where
答案：A
解析：句意“當(dāng)大家都就座后還剩下幾把椅子”，此處強(qiáng)調(diào)的是時(shí)間。until用于肯定句時(shí)一般與連續(xù)性動(dòng)詞連用，而句子中的sat down是短暫性動(dòng)詞詞組，因此B項(xiàng)不恰當(dāng)；C項(xiàng)語(yǔ)法不正確；D項(xiàng)表示地點(diǎn)，不符合題意。

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