A. B. C. D. E. 1.—Good morning, boys and girls. —Good morning, Ms Smart. ( ) 2.—Hello. —Hello, Ms Smart. I’m Lingling. ( ) 3.—Hi, Daming. —Hello, Sam. ( ) 4.—How are you, Huanhuan? —I’m fine, thank you. ( ) 5.—Goodbye, Lingling. —Bye-bye, Daming. ( )