When Madam Curie did the science experiment again, she was more careful ________ she had made a mistake.
--- " ______ he open the door?" --- "Yes, please."
I will certainly be surprised if he ______ to tell them what he knows.
______ you make a little room for me?
I am told that her father is in London and ______ a dry-goods store.
George has arrived, but I did not know he ______ until yesterday.