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Ex-2. Complete the sentences. (+?-)
_______ you______(finish) your homework by the time the film stars?
She _______(have) the baby by the end of the month
Do you think that you______(get) married by the time you are 20?
In fifty year's time the pollution_________(double)
She's so lazy. I bet you that she ________ (not do) anything when we get there
My dad_______(retire) by 2020
There's no point in going now - the film______(start) when we get there.
We_______ (not reach) the camp site by nightfall
School_____(start) by the time we get back from holiday
The battery________(go) flat before I can get home
You can call me at work at 8 am. I_____(arrive) at the office by then.
THey will be tired when we arrive. They ______ (not sleep) for a long time
Unless further action is taken, the black rhino_________(become) extinct in a few years time.

Will you have finished your homework by the time the film stars? She will have had the baby by the end of the month. Do you think that you will have got married by the time you are 20? In fifty year's time the pollution will have doubled. She's so lazy. I bet you that she will not have done anything when we get there. My dad will have retired by 2020. There's no point in going now - the film will have started when we get there. We will nor have reached the camp site by nightfall. School will have started by the time we get back from holiday. The battery will have gone flat before I can get home. You can call me at work at 8 am. I will have arrived at the office by then. They will be tired when we arrive. They will not have slept for a long time. Unless further action is taken, the black rhino will have become extinct in a few years time.