—Could I smoke here?—I’d prefer _______if you don’t smoke in front of the children.

 —Life is hard these days.—At least we have some money left. That's ________, isn't it?

—Which kind of juice would you prefer, pineapple or orange? —_____. I must say I’ve a strong preference for tea. 

 They have done much of the work; when will ________ be finished?

----Is there anyone who is going to the Great Wall.----________.