Some parents are just too protective. They want to _______ their kids from every kind of danger, real or imagined.

We used to mistake that heavy objects fell faster than light       .

 I refuse to lie about it--it’s against all my _________.

Practising Chinese Kung fu can not only _____ one’s strength, but also develop one’s character.

.I invited him to dinner, but he___ my invitation with thanks.