18．如今人們非常關(guān)注的是食品安全和空氣質(zhì)量．（concern）Nowadays what people are （very） much concerned about is food safety andair quality．
Food safety and air quality are people's major concerns nowadays．．

分析 Nowadays what people are （very） much concerned about is food safety and air quality．
Food safety and air quality are people's major concerns nowadays．

解答 Nowadays what people are （very） much concerned about is food safety and air quality．
Food safety and air quality are people's major concerns nowadays．
本句是對(duì)事物的一種看法，所以用一般現(xiàn)在時(shí)．
本句可用一個(gè)主語從句或者一個(gè)主系表的簡(jiǎn)單句表述都可以．what people are （very） much concerned about為一主語從句；major主要的，重要的．

點(diǎn)評(píng) 可以結(jié)合句意及括號(hào)中的提示詞來選擇合適的句型，適當(dāng)使用復(fù)合句對(duì)于提升句子的品味很重要．

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