I will come back to see you next week if I am free.
--- Would you mind my opening the window? ---
Bob often says that swimming is _____________ than hiking in reducing weight, but he always spends more time on swimming.
—How about climbing the hill?—I would rather along the river than the hill. I'm a bit tired.
--- How cool the iPhone5s is !---In our shop it_____ very well now. Get one before it________out.
I do not doubt ________ win in the race.