— Could you give _______ an introduction to the new machine?— Of course. I will tell you how to use it.
The meetingfor two hours,but they stillany agreement.
—Dad, when shall we go to visit my grandpa? —Grandpa is very busy at present.We'll go to see him whenever __________.
Do you think the idea he stuck ____correct?
The hungry man eats his food _______he hadn ' t eaten for a week.
We must ________ our task, however hard it is.