A.Open the window, please. | B.Open the door, please. |
A.Close the book. | B.Open your books. |
A.at | B.on | C./ |
A.door | B.a door | C.an door |
A.Thank you | B.Yes, Mr. Green | C.I’m sorry |
A.Open the window, please. | B.Close the window. |
A.Come in, please. | B.I'm sorry. |
A.Look the blackboard. | B.Look at the blackboard. |