几道英语选择题请看补充说出原因

几道英语选择题请看补充说出原因
1----to give up smoking ,he three away his ----cigarettes A determined remaining Bdetermining remaining 不是也有determine to 也有be determined to do吗应该怎样区分.2 Anne is said -----in Africa ,and she will come back next month.A to do research B to be doing research Cto have done research D to have been doing research .怎样判断时态?——3Dearling,where ----the key to the door?___Oh ,I--it here ,but now it is gone .A did you put ; have put B have you put ; put.4 Where were you at lunch time I ----a seat for you in the dining hall.A saved B was saving C have saved D had saved 5 ----for the final exams,thestudents didnot have much time to play games.A prepared B preparing C TO be prepared D Be prepared..6 We sat side by side ,watching the sun going down behind the old Texaco service station across the busy street,---- I was never allowed to across unless ----- A the one ;being accompanied Bthat,accompanying C one ; accompanied D which ; accompanying .ONE 和THE ONE 怎样确定用哪一个?只要会的都可以答,不需要全部都会.
Mother wanted to be a good provider,a role she ----since her marriage to father A shoulders B shouldered C is shouldering D has been shoulding 这个句子主句不是过去时吗，那从句不就应该是过去的某种时态吗