– Tom, you left the lights in the classroom on.– Oh, sorry, I _________ to turn them off. Thanks for your reminding.
—________ I return the dictionary within three days? —No, you ________. You ________ keep it for five days.
Sir, you ________ be sitting in this waiting room. It is for women and children only.
The train has gone. You two ________ on time.
There was plenty of time. She ________ to the station.
Some pirates(海盗)appeared, so they ________ change their route.