—Won't you go shopping with your mother?—No.________ she promises to buy me a new sweater.

Children of this age should be reminded of________ to do in public places.

 Scientists are warning that ________ emissions of carbon (碳排放) are cut, we could be heading for an environmental disaster.

Double ovens are a good idea, especially ________ you are cooking several meals at a time. 

A man does not know the difficulty of anything _____ he does it personally .