_____ people have died of AIDS (艾滋病) since 1981.
Mike and I _______ net-friends. We talk on-line every week.
—Which car is _______, the yellow one or the red one? —The red one, I think.
— _______ does Earth Day come every year? —It comes on April 22.
Lily knows some Chinese, ______ she can read the words on the bottle.
—We’ll have a hiking trip tomorrow, but when shall we meet? —Let’s make it ______half past seven.