摘要：The missing boy was last seen near the river. A. playing B. to be playing C. play D. to play 27.I feel unwise to give a child whatever he or she wants. A. that B. how C. it D. what 28. It is wise to have some money for old age. A. put away B. kept up C. given away D. laid up 29. He slipped into the room, without himself . A. seen B. being seen C. seeing D. to see

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