已知中,D、E分别是AB、AC边上的点,,点F是BC边上一点,联结AF交DE于点G,那么下列结论中一定正确的是 ………………………………………( ) (A); (B); (C); (D). 答案:D.Lin Qiaozhi,________ after a day’s work,went late at night to deliver a baby for a poor family who could not pay her. A.to be tired B.tiring C.having tired D.tired