What jokes does the instructor tell the students?

One day, the geography teacher asked the students, where does this river go? A student suddenly stood up and sang: The river flows eastward. The teacher ignored him and then said, how many stars are there in the sky? That classmate sang again: the stars in the sky can participate in Beidou. The teacher is short of breath: get out! Student: Just leave. The teacher said helplessly, are you sick? Student: You have everything I have! Teacher: try again ... student: shout when you see an uneven road! Teacher: Do you believe I hit you? Student: Do it when you should ... Teacher's anger: I told you to quit school! Student: Rush into Kyushu.