20．No sound and no voice are heard．a(chǎn)re--is．

分析 沒(méi)有任何聲音被聽(tīng)到．

解答 答案：are--is．
考查主謂語(yǔ)的一致性．No-and no----指同一概念，作主語(yǔ)時(shí)用單數(shù)，且與hear為被動(dòng)關(guān)系，所以謂語(yǔ)用is  heard．

點(diǎn)評(píng) 考查漢譯英．
在英語(yǔ)的句子中，謂語(yǔ)要在人稱和數(shù)上與主語(yǔ)保持一致，主語(yǔ)和謂語(yǔ)一致的三條原則：形式一致原則、就近一致原則和意義一致原則．
1．形式一致原則，就是根據(jù)主語(yǔ)的單復(fù)數(shù)來(lái)決定謂語(yǔ)的單復(fù)數(shù)，根據(jù)主語(yǔ)的人稱來(lái)決定謂語(yǔ)的形式，
She has （got） a color TV set and we have （got） a black-and-white TV set．她有一部彩色電視機(jī)，我們有一部黑白電視機(jī)．
2．就近一致原則是指：在一個(gè)句子中，如果有兩個(gè)主語(yǔ)，謂語(yǔ)動(dòng)詞只跟相鄰的一個(gè)主語(yǔ)在人稱和數(shù)上保持一致．這種情況只要記住常見(jiàn)的幾種情況（如：or，either…or，neither…nor，not only…nut also…，not…but…，there be…etc．）就行了．例如：
Are you or I to go and deal with the problem？你去還是我去處理那個(gè)問(wèn)題？
3．意義一致原則是在英語(yǔ)中，有些名詞作主語(yǔ)時(shí)，要根據(jù)具體語(yǔ)境中該名詞的意義來(lái)確定其謂語(yǔ)的單復(fù)數(shù)．常見(jiàn)的有下列幾種情況：
The old are easy to catch cold in winter．老年人冬天容易感冒．
Nine plus nine is eighteen．

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