2018年山西省英语人教版必修2 Unit 4 Wildlife protection 同步练习(六).docVIP

Unit 4 Wildlife protection 同步练习(六) 一、用准确的介词或副词填空 Many of the animals have died______ _______a result _______the enemies that kill and eat them 2．Wildlife is ______danger _______disappearing，which we should be concerned_______． 3．There was an antelope ________his eyes fixed _______her． 4．A dog suddenly came out _______the bed． 5．________now________，we should pay more attention ______wildlife protection． 二、完形填空 The world is __1___hungry，it is also thirsty for water．This may seem ___2___to you，for nearly 70 percent of the earth’S surface(表面)is covered with water．B ut about 97 percent of this huge __3___is seawater，___4___salt water．Man can only drink and use ___5__3 percent the fresh water that comes from rivers，lakes，underground，and other sources(来源)．And we can’t even use all of__6___，because some of it is in the ___7___of icebergs and glaciers(冰川)．Even worse, some of it has been polluted(污染)．__8___，as things stand today，this small amount of water，which ___9___by rainfall，is still enough for US．But our need for water is increasing rapidly almost __10___．Only if we take steps can we solve this problem now ___11___ aserious worldwide water shortage in the future． One of the first steps we should take is to develop ways of ___12___ water．Today，in most large cities，water is used ___13___ and then sent into a sewer system(下水道系统)．From there it goes to the sea or run into underground storage tank(蓄水池)．But it is __14__ _to pipe water that has been used to a purifying plant(净化厂)．There it can be filtered(过滤)and treated with chemicals SO that it can be used again. ___15__ way is to make use of sea water by removing (去除)the salt．This is called desalinization(脱盐)and it is already in use in many parts of the world． ( )1．A．either B．neither C．not only D．too ( )2．A．new B．strange C．exciting D．puzzling ( )3．A．number B．deal C．quantity D．amount ( )4．A．or B．as C．for D．with ( )5．A．another B．the other C．other D．every ( )6．A．