How long do you think it will be ________ thecomputer company puts forward a new product

Could you mewith information about Student Exchange Program—Yes, of course. It’s on this piece of paper.

I suppose by the time I come back in ten years’ time all these old houses_______down

We were having a meeting ______ suddenly someone knocked at the door[ ]

ering the time limits, we also provide CDs________ our students may prefer to study at home