— When did you first meet Tom? — On May 2, ____, the first day I came to this city.
Some researchers believe that there is no doubt ______a cure for AIDS will be found.
He was about to tell me the secret ______ someone patted him on the shoulder.
______ you’re tried it, you can’t imagine how pleasant it is.
For miles around me there was nothing but a desert, without a single plant or tree ______.
More and more people choose to shop in a supermarket as it offers a great ____ of goods.