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1._____________ water is one of the factors that have driven many species to the verge of extinction.
A.Contaminating        B.Contaminate        C.Contamination        D.Contaminated
2.The ____________ use of pesticides and herbicides has led to contamination of groundwater in some areas.
A.widespread            B.occasional            C.general            D.experimental
3.Air ______________, together with littering, is causing many problems in our cities today.
A.pollute            B.pollution            C.polluting            D.polluted
4.Many people in this city have received medical _______________ for the disease.
A.support            B.treatment            C.help                D.assistance
5.In many poor nations, there are frequent outbreaks of cholera and other diseases because people there _____________ untreated water.
A.drink                B.to drink            C.drinking            D.drank
6.The road in front of my office is always ______________ when it rains heavily.
A.to flood            B.flooding            C.flood                D.flooded
7.Too much carbon dioxide in the atmosphere causes global ____________.
A.warm            B.warming            C.warmly            D.warmth
8.It won't be possible to save the Earth if we don't take _____________ right now.
A.action            B.job                C.work                D.duty
9.Singapore is famous for its __________ and green trees.
A.cleanliness            B.cleanly            C.cleaning            D.clean
10.On Christmas Eve, most big cities, especially London are __________ with coloured lights across the streets and enormous Christmas trees.
A.decorated            B.hang                C.put                    D.made
11.In the United States, there are 50 __________ and six different time zones across the country.
A.states            B.nations            C.towns            D.countries
12.You should go to Canada in summer because it is the most popular time for visitors to __________ Niagara Falls and see the beautiful sights there.
A.stay                B.look                C.tour                D.visit
13.Nowadays you still see the __________ men wear kilts (skirts) to wedding or other formal occasions.
A.Scottish            B.Scotland            C.Scots            D.Scot
14.The USA has a population of about 304 million, and it's the third __________ country in the world.
A.smallest            B.largest            C.narrowest            D.highest
15.In some English speaking countries, turkey and pudding are __________ food at Christmas.
A.national            B.historical            C.traditional            D.possible
16.New Zealand __________ lovers of nature and fans of dangerous sports.
A.attracts            B.keeps            C.calls                D.asks
17.Queenstown in New Zealand has got beautiful __________ and a dry climate, so it's ideal for outdoor activities.
A.look                B.viewing            C.atmosphere            D.scenery
18.Typhoons are severe tropical storms. They sometimes happen in my __________.
A.stay                B.home            C.house            D.hometown
19.When a typhoon happened, many houses and roads __________ destroyed or flooded.
A.is                B.are                C.was                D.were
20.Last year, there was a big typhoon in my area. It caused extensive damage to our __________.
A.property            B.furniture            C.wealth            D.savings
21.The government sent rescue food, drink and medical supplies to __________ homes.
A.flood                B.flooding            C.flooded            D.floods
22.All people who were without homes in the flood were provided with __________ accommodation.
A.short                B.temporary            C.present            D.instant
23.When the earthquake happened, most people in this building managed to run __________ of it.
A.quickly            B.fast                C.smoothly            D.out