The factory ______ its waste into the river, but now it deals with the waste in a new way.
My sister often ______ gift, but she doesn’t ______ them.
The History Museum is a very famous museum ______ lots of old things.
The baby was born(出生于) ______ a warm morning.
_____ there will be a heavy rain, _____ she takes a raincoat with her.
Please be careful ______ your study ______ now on.