砍伐自己房前屋后、自留地的零星树木是否需要办理采伐许可证？
参考答案：
不需要
—Could you come out to play with us this evening?
—Sorry , I________ dark . [ ]
A. am afraid of
B. am afraid to
C. am afraid that
D. am afraid for
微笑时的唇低线位于下颌中切牙的（）
A.切缘
B.切1/3
C.切1/2
D.切2/3
E.龈缘
