—Will you go to Mary’s birthday party?

   —No, ____ invited, I can’t go to it. I’ll be too busy then.

   A. if      B. unless     C. even though    D. when

—Will you go to Mary’s birthday party?

   —No, ____ invited, I can’t go to it. I’ll be too busy then.

   A. if      B. unless     C. even though    D. when

—Will you go to Mary’s birthday party?

—No, ____ invited, I can’t go to it. I’ll be too busy then.

A. if      B. unless     C. even though    D. when

—Will you go to Mary’s birthday party?

   —No, ____ invited, I can’t go to it because I’ll be too busy then.

  A. whether        B. even if          C. unless             D. when

—Will you go to Mary’s birthday party?

—No, ____ invited, I can’t go to it. I’ll be too busy then.

1. A.
   if
2. B.
   unless
3. C.
   even though
4. D.
   when