Day1初级下

初级下 81-148，共70课，每天4课，预计18天。现已拖延一天，day1&2为一天学习内容，预计增加一天，19天。

lesson81

1. die of 因为XX病死去
   pass away过世
2. try doing sth 试着做。。。If this way doesn't work,you may try calling her.
   try to do sth 设法做。。。When I get there,I'll try to call you back.
3. He has been to beijing several times.
   quit 三态相同
4. couldn't stop doing
   couldn't resist doing
   can't help doing
5. It is no use doing