There ____ a set of keys in the Lost and Found case.
How glad we are! Miss Li will teach _______ English this term.
--_______ does she chat with friends on the Internet? --Once a week.
I don’t want to buy this pair of black shoes. I want to buy ________.
--Shall we go to the park next Sunday? --________!
Simon does the show _________ the clothes _______ the 1980s.