16.I regret _______my friend Hoa to my birthday party. A. not to invite B. not invite C. not inviting D. I didnt invite 17 . _______all the teachers, I would like to wish you a happy new year. A. Instead of B. On behalf of C. In place of D. On account of 18. Will you empty the basket for me, please? A. Yes, certainly B. Yes, please . C. No, thanks D. No, I dont. 19. Dont worry. This is nothing that_______ you. A. matters B. causes C. concerns D. influences 20. I think this book will be bought by people_______ in Asian history. A. who they are interested B. are interested C. interested D. they are interested