【正文】
。 1. _______ at the blackboard. 2. _______ the window. It’s dirty. 3. It’s cold. _______ the door, please. 4. It’s hot. _______ the door, ________. 五 、 Summary 祈使句: Close the door, please. Look at the blackboard, please. Please clean the blackboard,. Open the door, please.