Be careful of the dog! It’s. Keep away from it.

Will you go with us for an outing on Saturday?— I’d like to, but I am really busy these days. I can’t _______ a whole weekend.

Pollution is ______bad ______many rivers are full of chemicals and kill sea creatures.

Jack, when shall we go to visit Mr. Smith? – It’s up to him. We’ll go to see him whenever _______.

My mother often tells me not to ________ or not to look down upon others.