单项选择题
A.Is it a real emergency B.Do you have an appointment C.In that case. you'll have to wait. D.I'll talk to the dentist and squeeze you irk
A.You're welcome. B.Never mind. C.It doesn't matter. D.It's just OK.
A.You can count on it B.You can depend on it C.You may think of it D.You may be sure of it.