Dựa vào từ cho sắn , viết câu hoàn chỉnh:
1, If/people/not/stp/dumping/waste/into/rivers/,/pollution/increase/.
2,If/polar/ice caps/melt/,/huge landmasses/ be/under/water.
3, If the air,/in/city/be/polluted/,it/can/cause/peole's/respiratory/problems.
4,If/smog/be/frequently/formed/in/city/,/it/cause/dificulty/in/breathing/headache/even/lung cancer,
5, If/ carbon monoxide/concentrate/in/great/amounts/,/it/be/ harmful.
6, The climate/change/if/more trees / be /cut/down/for/hardwood/.
7, If/we/not/control/pollution/soon/,/it/be/too/late.
8, If/we/not/protect/frontier/,/we/suffer/many/from/natural/disasters.
If people don’t stop dumping waste into the rivers, then pollution will increase. If both north and south polar ice caps melt, many huge landmasses will be submerged under a lot of water. If the air in the city is polluted, it can cause people’s respiratory problems. If smog is frequently formed in the city, it can cause difficulty in breathing, headache, and even lung cancer. If carbon monoxide concentrates in great amounts, it’ll be harmful. The climate will change if more trees are cut down for hardwood. If we don’t control pollution soon, it will be too late. If we don’t protect the frontier, we will suffer many losses from natural disasters.
