—You seem to show interest in cooking.—What?_________, I’m getting tired of it.
It is useful to be able to predict the extent _______which a price change will affect supply and demand.
In the dark street,there wasn't single person _______she could turn for help.
(2012年南京高三模考)If something is “dog-eat-dog”,it is a situation ________people have to take care of themselves and look after their own interests.
By nine o'clock,all the Olympic torch bearers had reached the top of Mount Qomolangma,________appeared a rare rainbow soon.
It’s quite warm now.Leaving the heating on all the time ________ electricity.