我约了外教四点半见面。
一个男孩儿教一个女孩儿四则运算，他说那是他的任务。
A boy was teaching a girl arithmetic, he said it was his mission.
到明年四月你教英语就有十年了。
Next April you will have been teaching English for ten years.
到上个七月为止他教数学四年了。
上学期我教的是三年级，这学期教四年级。
Last semester I taught third grade and this semester, fourth grade.
我是洪文君，这学期是我在中文学校教的第四年。
My name is Robin Hung, this is my forth year teaching in Chinese School.
我是洪文君，这学期是我在中文学校教的第四年。
My name is Robin Hung, this is my forth year teaching in Chinese School.
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