—Could you tell me the____  of making such tasty cakes? — Well, I just follow the directons in the cookbook.

The great _____ to living on a main road is the constant noise.

Ancient Greeks were responsible for many of the _______ in science and other fields．

In order to prevent people spreading rumours through the Internet, the government decided to place ______ on the freedom of spreading news on line.

Don't leave matches or cigarettes on the table within the _____ of little children.