By the time he was ten, Edison _________ experiments in chemistry.
--- Why were you late for the class, Jenny? --- Oh, my clock must be running slow, and it needs ____.
He played the computer game till late last night, ________,early this morning.
Mrs. Black had her left hand ______while cooking.
We were swimming in the lake _____ suddenly the storm started.
_________we move the picture over there? Do you think it’ll look better?