You'd better __________ your reasons right now. We have no time to waste.
With more and more forests ______ many animals are facing the danger of dying out.
You may not agree, but ______ I think she is a very good girl.
Hiking by oneself can be fun and good for health. It may also be good for ______ building.
______ a passer-by, I carried the injured person into a shop.
-Can I help you? -Will you _____ my clothes while I have a swim?