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If we (recycle) ............... more, we (help) ................ our Earth.

• recycle; won't help

• recycle; will help

• don't recycle; will help

• don't recycle; will help

We (save) ........... a lot of trees if we (not waste) ............. so much paper

• will save; waste

• will save; waste

• won't save; don’t waste

• will save; don’t waste

More people (have) ........... fresh water if we only (use) ......... the water we need.

• will have; have use

• will have; use

• won't have; use

• will have; don't use

If the river (not be) .............. dirty, there (be) .................. more fish.

• is not; won't be

• is; will be

• is not; will be

• is; will be

If he (be) ................... ready to listen, I will tell him the truth.

• are

• am

• is

• is not

I (go) ................ swimming if it is not rainy

• will go

• go

• went

• goes

If it (be) ......... sunny next week, they (plant) ......... the vegetables

• is; will plant

• am; will plant

• are; will plant

• is; won't plant

If you don't study hard, you ....................... the exam.

• will fail

• fail

• would fail

• would have fail

I (not travel) ..................... to London if I don't get a cheap flight.

• don't travel

• wouldn't travel

• won't travel

• couldn't travel

If you press this switch, the computer .............. on.

• comes

• will come

• would come

• would have come