—How long can I _____ the English workbook? —For two weeks.
People should __________ from __________ down the trees to protect the earth.
I don’t think you can finish the work in such a short time, __________?
__________ useful advice he has given us!
I didn’t know when he _____ back. He said he would call me when he _____ home.
Four days __________ enough for us. We still need ________ two days.