Let’s say goodbye and I’ll meet you again on October 5, if _________.

1. A.
   you are convenient
2. B.
   you will be convenient
3. C.
   it is convenient to you
4. D.
   it will be convenient to you

Let’s say goodbye and I’ll meet you again on October 5, if _________.

[　　]

A．you are convenient

B．you will be convenient

C．it is convenient to you

D．it will be convenient to you