— I D LIKE TO INVITE YOU TO A PARTY THIS EVENING. — THANK YOU, BUT...
18. — I d like to invite you to a party this evening.
— Thank you, but _____ I’ll be free I m not sure at the moment.
A. while B. if C. when D. whether
18. — I d like to invite you to a party this evening.
— Thank you, but _____ I’ll be free I m not sure at the moment.
A. while B. if C. when D. whether