—Will you go to Mary’s birthday party?—No invited I can’t go to it. I’ll be too busy th

问题补充：

—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

答案：

A. if

B. unless

C. even though

D. when

解析：我那时将很忙，即使她邀请我，我也不会去的，故选C。