题目

如图所示，中，直线与边，及的延长线分别交于点，，则_________． 答案：【答案】4【解析】根据题意，求得之间的关系，从而推出的等量关系，即可求得.连接，如下图所示：因为，故可得，因为三点共线，故可得，故.故答案为：.I had studied here ________ you got here, I’ll finish school ________.A.before long; long beforeB.long before; long beforeC.before long; before longD.long before; before long