【正文】 oil reduces disease and helps crops grow strong and healthy. 健康的土壤會(huì)減少病蟲(chóng)害并且?guī)椭r(nóng)作物茁壯成長(zhǎng)。 [歸納拓展 ] reduce ；縮小；使 ?? 陷入某種更糟的狀態(tài) reduce ...減少到 ?? reduce ...減少了 ?? be reduced to 淪落為 ?? [語(yǔ)境助記 ] (1)He is trying to reduce expenses. 他正試圖減少開(kāi)支。 (2)We must gradually reduce the wage gap. 我們必須逐步縮小工資差距。 (3)The shopkeeper reduced the price by 10. 店主把價(jià)格降了 10 美元。 [題組訓(xùn)練 ] (1)She reduced her weight by 5 kilos. 她的體重減少了 5 公斤。 (2)The poor boy is reduced to begging in the street. 那個(gè)可憐的孩子淪落到沿街乞討。 (3)The skirt was reduced to ￡ 10 in the sale. 在大減價(jià)期間，這條裙子減價(jià)到 10 英鎊。 6． This also keeps the air， soil， water and crops free from chemicals. 這還可以讓空氣、土壤、水以及農(nóng)作物不受化學(xué)物質(zhì)的污染。 [歸納拓展 ] keep...free from/of 使 ?? 免受 (影響、傷害等 )；使 ?? 不含 (有害物 ) free from 不含 (有害物等的 )；不受 ?? 傷害 (或影響等的 ) for free/free of charge 免費(fèi) free sb./oneself/sth. of/from ，去除 [語(yǔ)境助記 ] (1)This medicine can keep you free from pain. 這種藥可以止痛。 (2)We should use new energy to keep our environment free of pollution. 我們應(yīng)當(dāng)使用新能源，使我們的環(huán)境免受污染。 (3)These exercises help free the body of tension. 這些鍛煉可以使緊張的身體放松。 [題組訓(xùn)練 ] (1)We should keep ourselves free from drugs (使自己不受毒品的傷害 )． (2)We’ ve managed to keep the garden free from weeds (使花園免受雜草的傷害 ) this year. (3)Free from (從 ?? 擺脫出來(lái) ) endless homework on weekends， the students now find their own activities， such as taking a ride together to watch the sunrise. 7． Crops such as peas or soybeans put important minerals back into the soil， making it ready for crops such as wheat or corn that need rich and fertile soil. 像豌豆或大豆這樣的農(nóng)作物將重要的礦物質(zhì)帶回土壤，從而使之適宜于種植要求土壤肥沃的農(nóng)作物，比如小麥或玉米。 [歸納拓展 ] making it ready for crops...是現(xiàn)在分詞短語(yǔ)作結(jié)果狀語(yǔ)，表示由前面的事情引起的一種自然的結(jié)果。動(dòng)詞不定式作結(jié)果狀語(yǔ)時(shí)，多表示出乎意料的結(jié)果，有時(shí)前面加上 only，以加強(qiáng)語(yǔ)氣。 [語(yǔ)境助記 ] (1)His parents died early， leaving him an orphan. 他的父母早亡，他成了孤兒。 (2)The firefighter cut off the wire， preventing a big fire. 這名消防隊(duì)員剪斷了電線，阻止了一場(chǎng)大火的發(fā)生。 (3)We hurried to the station only to be told that the train had left. 我們急匆匆趕到車站，結(jié)果被告知火車已開(kāi)走了。 [題組訓(xùn)練 ] (1)More highways have been built in China， making (make) it much easier for people to travel from one place to another. (2)Oil prices have risen by 32 percent since the start of the year， reaching (reach) a record US a barrel on April 4. (3)A small plane crashed into a hillside five miles east of the city， killing (kill) all four people on board. 8． Swap summaries with your partner and give each other ments. 和你的搭檔交換摘要并互作評(píng)論。 [歸納拓展 ] ment n．評(píng)論；議論； vi.amp。；作出評(píng)論 ment on/upon 對(duì) ?? 進(jìn)行評(píng)論 make ments/no ment on...對(duì) …… 進(jìn)行評(píng)論 /不進(jìn)行評(píng)論 no ment 無(wú)可奉告 [語(yǔ)境助記 ] (1)The scandal caused a lot of ment. 這件丑聞遭到很多議論。 (2)He did not ment on what I said. 他對(duì)我的話未作評(píng)論。 [題組訓(xùn)練 ] (1)Do you have any ments to make (make)on the recent developments? (2)— Will you resign， Minister? — No ment (無(wú)可奉告 )! (3)She was asked about the pay increase but made no ment (不進(jìn)行評(píng)論 )on it. Ⅰ .單詞拼寫(xiě) 1． A balanced diet provides nutrition(營(yíng)養(yǎng) ) for your body. 2． Several new productions(作品 ) will appear this month. 3． Often， chemical(化學(xué)的 )materials used for industrial productions cause dangerous forms of waste. 4． The receiver creates its own summary(摘要 ) and pares it with the one we sent. 5． The discovery(發(fā)現(xiàn) ) that her assistant had lied made Patty decide to fire him. Ⅱ .選詞填空 be confused about， reduce to， lead to， turn to， focus on， keep...free from... 1． There is no doubt that stress can le