He is believed____________ in at his office on his way home.
-----Would you mind me smoking here? ------ ______. It’s non-smoking area here.
The World War II made______ impossible for Einstein to go on with his research.
________! Our troubles will soon be over.
-----Excuse me. Is this the right way to the Summer Palace? -----Sorry, I am not sure. But it _______ be.
_______ you’ve got such a good chance, you might as well make full use of it.