1. If/people/ not/ stop/ 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/ people’s/ respiratory/ problems. ____________________________________________ 4. If/smog/ be/ frequently/ formed/ in/ city/,/it/ cause/ difficulty/ 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. ____________________________________________

2 câu trả lời

`1` If people don't stop dumping waste into rivers , pollution will increase

`2` If the polar ice caps melt, huge landmasses will be under water

`3` If the air in the city is polluted , it can cause people's respiratory problems

`4` If smog is frequently formed in the city , it will cause difficulty in breathing, headache and even lung cancer

`5` If carbon monoxide concentrates in great amounts , it will be harmful

`6` The climate will change if more trees are cut down for hardwood

`7` If we don't control pollution soon , it will be too late

`8` If we don't protect the frontier forests, we will suffer from many natural disasters

Giải thích

`->` Cấu trúc câu đk loại `1` : If + mệnh đề thì HTĐ , will/can/shall/... + V-inf

`->` Dùng để nói về một sự việc có thể xảy ra ở hiện tại hoặc tương lai nếu có một điều kiện nào đó

`1)` If people don’t stop dumping waste into rivers, the pollution will increase.

`2)` If the polar ice caps melted, huge landmasses will be under the water

`3)` If the air in the city is polluted, it can cause people’s respiratory problems

`4)` If smog is frequently formed in the city, it’ll cause difficulty in breathing, headache and even lung cancer

`5)` If carbon monoxide concentrates in great amounts, it’ll be harmful

`6)` The climate’ll change if more trees are cut down for hardwood

`7)` If we do not control the pollution soon, it will be too late

`8)` If we don’t protect the frontier, we will suffer from many natural disasters

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