._______ you call me to say you are not coming, I’ll see you at the theatre.

A. Until         B. If           C. As             D. Unless

______ you call me to say you are not coming, I’ll see you at the theatre.

1. A.
   Until
2. B.
   If
3. C.
   As
4. D.
   Unless

 _______ you call me to say you are not coming, I’ll see you at the theatre．

     A．Until          B．If           C．As             D．Unless

._______ you call me to say you are not coming, I’ll see you at the theatre.

A. Until         B. If           C. As             D. Unless

_______ you call me to say you are not coming, I’ll see you at the theatre.

   A. Until       B. If           C. As             D. Unless