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30. Last month, the Japanese government expressed their thanks for the aid they ______ from China.

A. receive                 B. are receiving         C. have received        D. had received

分析：D。本句意為：上個(gè)月，日本政府表達(dá)了他們從中國(guó)得到的援助。從時(shí)間上看，應(yīng)該是先得到援助，然后才表示感謝，由于“表達(dá)”用的是一般過(guò)去時(shí)（expressed），所以“得到援助”就應(yīng)用過(guò)去完成時(shí)（had received）。又如：

He was conscious that he had annoyed his boss. 他意識(shí)到他惹煩了上司。

Although he had only entered the contest for fun, he won first prize. 盡管他參加這次競(jìng)賽只不過(guò)是鬧著玩兒而已，卻贏(yíng)得了頭獎(jiǎng)。

31. We arrived at work in the morning and found that somebody ______into the office during the night.

A. broke                   B. had broken            C. has broken            D. was breaking

分析：B。從時(shí)間上看，肯定是先有人在夜間闖進(jìn)了辦公室，然后才會(huì)有人發(fā)現(xiàn)這個(gè)情況。由于“發(fā)現(xiàn)”用的是一般過(guò)去時(shí)（found），所有夜間“闖進(jìn)”辦公室，就應(yīng)用過(guò)去完成時(shí)（had broken）。又如：

I went home directly I had finished work. 我一干完工作就回家了。

32. By the time Jack returned home from England, his son ______ from college.

A. graduated             B. has graduated        C. had been               D. had graduated

分析：D。本句意為：當(dāng)杰克從英格蘭返回家時(shí)，他的兒子已經(jīng)大學(xué)畢業(yè)了。顯然，兒子大學(xué)畢業(yè)在先，杰克返回家在后。而“返回”家用的是一般過(guò)去時(shí)（returned），故兒子大學(xué)畢業(yè)要用過(guò)去完成時(shí)（had graduated）。又如：

I read that he had resigned. 我看到他已辭職的報(bào)道。

The weather was rather worse than I had expected. 天氣要比我預(yù)料的還壞。

33. She was surprised to find the fridge empty; the child ______ everything!

A. had been eating     B. had eaten              C. have eaten            D. have been eating

分析：B。句子前面說(shuō)她發(fā)現(xiàn)冰箱是空的，她感到很吃驚，而冰箱為什么是空的呢？是因?yàn)槔锩娴臇|西都被孩子們吃掉了。顯然，孩子們吃掉冰箱里面的東西在先，她發(fā)現(xiàn)這個(gè)情況在后，而She was surprised to find the fridge empty用的是一般過(guò)去時(shí)，故孩子們“吃掉”冰箱里面的東西要用過(guò)去完成時(shí)（had eaten）。又如：

That the attempt to save her had failed soon became widely known. 想救她而未救成，此事不久已盡人皆知。

I was surprised when I saw the farm. I had imagined it to be much bigger. 我看到那個(gè)農(nóng)場(chǎng)時(shí)很吃驚，我原認(rèn)為會(huì)它會(huì)大得多。

34. —What a mistake!

—Yes. I ______ his doing it another way, but without success.

A. was suggesting      B. will suggest           C. would suggest       D. had suggested

分析：D。根據(jù)句中的What a mistake（真是個(gè)愚蠢的錯(cuò)誤）和without success（沒(méi)有成功）可知，“沒(méi)有成功”的情況已經(jīng)發(fā)生了。為什么說(shuō)是個(gè)愚蠢的錯(cuò)呢？為什么沒(méi)有成功呢？原來(lái)是說(shuō)話(huà)者建議他用另外一種方法來(lái)做，很顯然，“建議”他用另外一種方法來(lái)做在先，他照去做并且沒(méi)有成功這件事在后，所以“建議”這個(gè)動(dòng)作應(yīng)用過(guò)去完成時(shí)（had suggested）。又如：