----- I’d like to invite you to dinner this Saturday, Mr smith. -----________.

A. Oh, no. Let’s not 　

B. I’d rather stay at home

C. I’m very sorry, but I have other plans 　

D. Oh, no. That’ll be too much trouble

— I’d like to invite you to our party this weekend.

 — Thank you, but _________I’ll have time I’m not sure at the moment.

  A. whether     B. what    C. when     D. that

-If you have time tonight，I’d like to invite you to a ball.?　

-That’s very nice of you，but are you ____??

　 A. free 　 B. careful   C. serious 　 D. true

—I’d like to invite you to a concert this evening.

—Thank you,but 　　 I’ll be free I’m not sure at that moment.

A.while　　　　　B.if　　　　C.when　　　　D.whether

--I’d like to invite you to dinner this Saturday.
--_______.