1.Spelling Bee is a contest _____ competitors, usually children, are asked to spell as many words as possible.
A. which B. where C. what D. when
2. A housing bubble is an economic situation _____ occurs when house prices rise much too fast.
A. which B. where C. what D. why
3. —My key is gone. Have you seen it anywhere?
—Oh, it is in the room we had a talk last night.
A. that B. which C. where D. what
