Don’t _____ your hands from the window when you are on a bus.
Could you tell me what time the train leaves Hefei for Beijing?—I’m afraid you need to ______on the Internet.
______ are you buying so much food?—Because your uncle is coming for supper.
The letter____Tommy received from his company yesterday is very important.
The girl was born __________ the morning of May 1, 1991.[ ]