Smile to the world, ________ the world will smile back to you.
fine weather it is! Let’s go fishing, ?
--Would you like to go to the park with me?--I’d like to you don’t want to go alone.
_________ people like him because he thinks _________ of himself than others.
— I’m going to take my driving test tomorrow. — __________!
I think ______ is necessary ______ us to do something useful to protect the birds.