David is the current holder of the 5,000-meter world record, but there is no ____ that he will win in the Olympic Games.

It is not enough to have ____ for the disabled. We should learn to respect them and help them understand their valuable roles in society.

. It is clear that the whole world is passing through a social revolution in which a central _____ must be taken by scientists and technologists.

Don’t make ______ of her. Can’t you see she is in ______?

It is said that dogs will keep you ________for as long as you want when you are feeling lonely.