【正文】
arthCBBD A great deal of water is needed in large cities. Some cities pump(抽水)water from wells. Some cities g____ water from lakes or rivers n______.But some cities have to bring water from lakes or rivers many miles away.Water is usually b_________ to a city from a place higher than the city itself. When water is f________ only in the lower place, it must be pumped up to the city. Then it is s________ to each home. Dams(水壩 ) are often b_______ in a river to keep the water fromflowing away. Then a new lake is formed. The city knows how muchwater will be n________ and allows the extra(額外的 ) water to flow below the dam. I ___ this way, the city stores water for its use.There is usually a b_________ near the dam. Much important work is d_______ there. For example, the water is tasted before it is piped to the city.et earbyroughtoundentuilteedednuildingone Fill in the blanks with the verbs using right tenses and voices:1. Large numbers of plastic bags ___________(use) in the supermarkets every day.2. _____ our country ____(send) up another manmade satellite last year? 3. Must the old people ____________(speak) to politely?4. Her grandma was still alive when he _________(take) to the hospital.5. English __________(speak) in many counties, but the Chinese ______ (speak) their own language.6. Three quarters of the world’s books______________(write) in . This kind of sweater ___________(sell) well.8. _________ Lesson 50 ___________(teach) next week?are usedDid sendbe spokenwas takenis spoken speakare writtensellsWill be taught你們學(xué)校附近有一個(gè)大圖書(shū)館,館內(nèi)有各種各樣的書(shū),請(qǐng)你將這個(gè)圖書(shū)館的要求向你的同學(xué)作一介紹,以便他們?nèi)ツ莾嚎磿?shū)時(shí)能遵守規(guī)則。1. 不要把包帶進(jìn)圖書(shū)館。 2. 看書(shū)時(shí)保持安靜。3. 一次可借四本書(shū),不能將書(shū)轉(zhuǎn)借給別人, 4. 圖書(shū)館每天早晨 8:00開(kāi)門,必須在下午 6:00前要 按時(shí)還書(shū)。離開(kāi)圖書(shū)館。要求:用英文寫一篇 60—80 詞左右的短