1.Tom suggested……………….to eat. A.go out B. going out C. to going out D. going on 2.I think we should use electricity………………….. to save money. A.careful B.careless C. carefully D.carelessly 3.That river is………………….with foam. A.littered B.ended C.thrown D.covered 4.Henry’s mother has just gone abroad. …………….., he has to look after himself. A. Therefore B.So C.However D.Morever 5.We need stronger laws to protect the …………………. . A.environment B.deforestation C.pollutants D.complication 6.The ……………….. causes many health problems. A.treasure B.pollution C.resources D.standard 7.In a few years’ time, our houses will be ……………….by solar energy. A.replaced B.installed C.heated D.conserved 8.Television is an ………………means of communication. A.natural B.alternative C.ineffective D.effective 9.The teacher divided the students …………………four groups. A.in B.into C.on D.onto 10.The cost of living in Vietnam is low compared ………………. Singapore. A.as B.with C.of D.than 11.Can you give us some advice ………………...how to improve English , Ms.Mary? A.of B.off C.on D.after 12. He got wet …………………he forgot his umbrella. A.so B.because of C.since D.but 13.We enjoy learning English ………………..we find it very difficult. A.moreover B.and C.however D.but 14.There is a …………………..faucet in your kitchen. A.drip B.dripping C.driping D.dripped 15.We are worried about the ………………...of the fresh water for the world’s population. A.short B.shortage C.shorten D.shortening 16.Do not throw cans………………the fence. A.on B.off C.over D.away 17.John is worried ………………….his exam. A.at B.on C.for D.about 18.Mrs.Jane divided her students………………..small groups. A.in B.into C.onto D.up to 19.Jane is very busy. ……………….., she is ready to help everyone. A.However B.Therefore C.But D.As 20. ……………….want more information about the food they buy. A.Consumers B.Producers C.Sellers D.Manufacturers II.Use the correct form of the word given in each sentence: 1.She has …………….. provided a picnic lunch for us. (kindness) 2.If we buy recycled ………………, we can do a part to save the environment.(produce) 3.The beach in our city is ………………. dirty. (extreme) 4.I am looking forward to receiving good ……………..from you. (respond) 5.They are discussing the preservation of ……………….resources. (nature) 6.Mary’s friends are very ……………… that she can’t stay longer. (dissapoint) 7.How can we keep our environment…………………? (pollute) 8.Our………………only want to buy products that work effectively. (consume) 9.Water is…………………down through the roof. (drip) 10.The schoolboys are often………………..students. (energy)