问题
I think this is ___ useful book, so I will keep it for ever.
A:a
B:an
C:/
D:the
B:an
C:/
D:the
正确答案是：
同类题型
What _______your Chinese teacher _______? -She is tall and beautiful.
They are living with their parents for the moment because their own house ____.
I’m not sure when he. When he , I’ll tell you.
Lily is ready ________ people any time, she always gives her seat to someone in need.
The office isn’t _______. Will you please turn on the lights? — Sure.