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书山有路勤为径，学海无涯苦作舟。PAGE2/NUMPAGES2祝愿天下莘莘学子：学业有成，金榜题名！考点跟踪训练20 九年级Units4—(245—246页)1、【单选题】Whenpowerstationsburnfuel，________.[3分]A、acidrainformB、airpollutioniscausedC、noisepollutioniscausedD、acidraingetsheavier答案：B;2、【单选题】?[2分]A、hopelessB、colourfulC、simpleD、wonderful答案：A;3、【单选题】Iaskedtwodays________becauseofmyillnesslastmonth.[2分]A、ofB、offC、fromD、away答案：B;4、【单选题】?[2分]A、mindB、troubleC、breathD、work答案：C;5、【单选题】Accordingtothearticle,acidrainaffectsus________.[3分]A、suddenlyB、slightlyC、seriouslyD、immediately答案：C;6、【单选题】?[2分]A、sadlyB、strictlyC、angrilyD、excitedly答案：D;7、【单选题】Whatadvicedoesthearticlegiveus?[3分]A、Gotoschoolonfootorbybikeifwecan.B、Gotobedearlierinordertouselesselectricity.C、Travelbybustopreventacidrain.D、Turnoffthetelevisiononrainydays.答案：A;8、【单选题】—Couldyouhearsomething?—Yes,thereisagirl_