题目内容
12. Knock at the door before (enter) , please.
12. entering 介词后接-ing形式。
4. 我成为我们班上最优秀的学生之一，这大大增强了我的信心和学习的动力。
1. —Mum,what did your doctor say?
—He advised me to live the air is fresher.
6. 现在，我们很多学生有一些心理问题，这使我们很担心，甚至对我们的学习和生活有不好的影响。
7. (make) of plastics,the machines are light in weight.
3. 进入教室，李老师惊奇地发现我们站成一队，鼓掌并且大声说教师节快乐！”
4. —Why was he fined?
—He happened to (see) picking several flowers in the park.
6. 尽管在这破旧的校园和设备差的教室里我感到失望，但我发现老师们却既耐心又体贴。
2. The students started their exciting journey in balloons (drive) by jets of hot gas.
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