题干
--- Where's your cousin?
--- He his homework in his bedroom.
A：is doing
B：does
C：doesn't do
D：doing
答案(点此获取答案解析）
A
--- Where's your cousin?
--- He his homework in his bedroom.
A：is doing
B：does
C：doesn't do
D：doing
下列函数中
满足其中任一等式的是（ ）
