1. In the bookshop, a reader asked the shop keeper _____ Who Moved My Cheese was an interesting book. （北京市东城区）
A. that B. how C. wh at D. if
2. —I don't know _____ Mr. Green will come to see us.
—He will help us with our English. （杭州市）
A. why B. when C. how D. where
3. —We never know _____ the old man is.
—They say he is a teacher. （鄂州市）
A. what B. who C. which D. where
