18.After you have used the dictionary,please just put it back_________it belongs.
I’m sorry, but I didn’t see how we can get all this work you assigned_______ by next Tuesday.
She left the city, ________ never to return.
The film is well worth _________.
It should not be a question of humans_________ and nature ____________.
The couple decided to ____________ a child because they couldn’t have babies.