题干
—Sorry, Miss Liu. I forgot __________ my homework to school.
— __________ so careless, Sandy.
A：to bring; Don't be
B：to bring; Not be
C：bringing; Don't be
D：bringing; Not be
答案(点此获取答案解析）
A
(
<β<π)，且sin(α＋β)＝cosα，则tan(α＋β)＝( )
