( )______Saturday morning, Mr. Black walked to the park. A. In B. At C. On
—Goodbye! — A.This is Sarah. B.Bye! C.Very well,thanks.
—Good afternoon. — A.Good morning. B.Good afternoon. C.Good idea!
—Let's make a puppet. — A.Great! B.Goodbye! C.Look at my nose!
—Shake your body. — A.Thank you. B.OK! C.Clap your hands.
—Hi!I'm Zhang Nan. — A.Let's go to school. B.Nice to meet you. C.Fine,thank you.