Peter doesn’t tell me when he _______. I’ll telephone you as soon as he ______.

If you _______that kind of fish, you ________very sick.

She will call you if she ____.
A. goes to  B. come back    C. comes back

I don’t know ______ he will come tomorrow. ______ he comes , I’ll tell you.

We will have no water to drink _________ we don’t protect the earth.
A. until                    B. if                       C. unless

I didn’t know when he     back. He said he would call me when he     home.

Sally took a photo of her friends while they ______ computer games.

—Do you know when he        back tomorrow?
—Sorry, I don’t know. When he        back, I will tell you.

—Dad, please tell me when Mum _____.I miss her very much.
—She will return when she _____her task. And she will bring a nice present for you.

If we don’t save energy, it _____ some day.