Writing

A. how long

B. in

C. long

D. through 

A. matters     

B. loading     

C. software     

D. onto 

A. into

B. no more

C. far

D. for 

A. took

B. because of

C. no

D. left 

A. what     

B. over    

C. off     

D. off 

A. If people breathed contaminated air, they had breathing problems.

B. If people breathed contaminated air, they would have breathing problems.

C. If people breath contaminated air, they have breathing problems.

D. If people breath contaminated air, they will have breathing problems.

A. Many people in this area have cholera because they drink untreated water.

B. Many people on this area have cholera because they drink untreated water.

C. Many people on this area have cholera because they drink untreating water.

D. Many people in this area have cholera because they drink untreating water.

A. The street not look attractive because there’s a lot of rubbish.

B. The street not look attractive because there’re a lot of rubbish.

C. The street doesn’t look attractive because there’s a lot of rubbish.

D. The street don’t look attractive because there’re a lot of rubbish.

A. The music club is making so much noise that the residents require them to turn the music down.

B. The music club is make so much noise that the residents require them to turn the music down.

C. The music club be make so much noise that the residents require them to turn the music down.

D. The music club be making so much noise that the residents require them to turn the music down.

A. Visual pollution prevents us from seeing far away.

B. Visual pollution prevents us with seeing far away.

C. Visual pollution prevents us on seeing far away.

D. Visual pollution prevents us of seeing far away.

A. Apply lights in almost everything at night is very wasteful.

B. To apply lights in almost everything at night is not wasteful.

C. Almost everything is wasteful at night.

D. It’s interesting to apply lights in almost everything at night.

A. Famers use too many pesticides and herbicides, but the soil is poisoned.

B. Famers use too many pesticides and herbicides, for the soil is poisoned.

C. Famers use too many pesticides and herbicides, so the soil is poisoned.

D. Famers use too many pesticides and herbicides, or the soil is poisoned.

A. Unless you don’t stop swimming in that lake, you will have a rash.

B. Unless you stop swimming in that lake, you will have a rash.

C. If you don’t keep swimming in that lake, you will have a rash.

D. Unless you keep stop swimming in that lake, you will have a rash.

A. The polluted water causes in the death of many aquatic animals and plants.

B. The polluted water leads to the death of many aquatic animals and plants.

C. The polluted water causes to the death of many aquatic animals and plants.

D. The polluted water leads in the death of many aquatic animals and plants.

A. If people don’t use too many vehicles, the air won’t be polluted.

B. If people won’t use too many vehicles, the air don’t be polluted.

C. If people wouldn’t use too many vehicles, the air didn’t be polluted.

D. If people didn’t use too many vehicles, the air wouldn’t be polluted.