These jars are , so please put them in the recycling bin. (recycle)

The EPA has identified carbon monoxide (CO) as a main air . (pollute)

New legislation still does not offer adequate for many endangered species. (protect)

I'm sure he'll have an accident if he (keep) driving like that.

If the taxi doesn't come soon, I (drive) you myself.

You will meet Joe if you (come) early. He'll be here until 3 o'clock.

(your parents / be) upset if you don't pass the entrance exam?

I (do) some work in the garden if it doesn't rain tomorrow.