---What do you think of modern art? ---______, it’s awful.
John opened the door. There _____ he had never seen before.
______, the car stopped all at once.
He ______ busy yesterday, or he ______ you with your experiment.
--What do you want to do next? We have half an hour until the basketball game. ---____. Whatever you want to do is fine with me.
--- What’s the noise? It sounds as if it comes from upstairs. --- ______.It must be the window-cleaner working, next door.