A. —Look at the blackboard. What’s this? —It’s a robot. B. —Good afternoon, class. —Good afternoon, Miss Wang. C. —Please open the door. —Yes, Mum. D. —I’m sorry, Mr Green. —Come in, Mike. |
A.Look | B.Close | C.Open |
A.up | B.down | C.in |
A.open the door | B.open the window | C.close the window |
A.for | B.in | C.on |