问题
Mum, can I help you with the cleaning? – Thank you, dear. But you are _______ now. You must wait until you are _______.
A:too young; too old
B:too young; enough old
C:so young; enough old
D:too young; old enough
B:too young; enough old
C:so young; enough old
D:too young; old enough
正确答案是：
