The driver in front stopped so suddenly. Therefore, the accident happened.

If the sea water continues to be polluted, many fish species ______ extinct.

I would have crashed the car _____.

Lan wishes there ______a smart board in her classroom

If you want your tea sweeter, you _____ need to add some more milk or sugar.

We’ll get wet if we ______ out.

Choose the best answer.

If you spoke more slowly, he _____ you.

It was much colder than we had thought. _____ we had taken more warm clothes.

If you _____  to take a bus to school now, I ____ you a lift a little later.

If she _____ Chinese, I believe that she _____  it very well. However, she doesn’t pay any attention to it.

If Tom ______ an alarm, the thieves wouldn't have broken into his house.

If I _____  you, I ____ learn one more language.

If he ________ me the reason yesterday, I ________ sad now. 

If local people drink this untreated water, they _______ have cholera.

The plants ____ if they don’t get sunlight and water.

Had you told me that this was going to happen, I __________it.