— Where did you put the car keys? 

— Oh, I _____ I put them on the chair because the phone rang as I _____ in. [ ]

A. remembered; come

B. remembered; was coming

C. remember; come

D. remember; was coming

被投诉旅行社应当在接到《旅游投诉受理通知书》之日起（）内作出书面答复，提出答辩的事实、理由和证据。

A.7日

B.7个工作日

C.10日

D.10个工作日