问题补充：
I’m very sorry to keep you for a long time
A. wait
B. waits
C. waiting
D. to wait
答案：
A. wait
B. waits
(答案→)C. waiting
D. to wait
解析：考查固定用法。keep sb. doing sth.“让某人一直做某事”。句意“让你等这么久真是抱歉。”故选C。
如果觉得《I’m very sorry to keep you for a long timeA. waitB. waitsC. waitingD. to wait》对你有帮助，请点赞、收藏，并留下你的观点哦！
