【正文】
( ) . The boy plays in a tree. B. The monkey eats a banana in a tree. C. The panda climbs a tree. ( ) . The boys are going to do a surve y today. B. The children are going to swim today. C. The children are going to play on the swing. ( ) . The pig is going to build a house tomorrow. B. The pig is building a house now. C. The pig is going to go fishing this afternoon. ( ) . How old are you, Gary?