.Please don’t do anything harmful ________ our nature, or we humans will have no ________ each other.
.He__________ well with a boy in his class. They often do homework together.
Sorry, I do not break the plate ________________
My friend came to school _________,I told him I ______about her.
The athlete seldom wears anything other than sportswear ______the season is.
The black horse is ______ of the pair.