单项选择题
A.did I B.had I C.I had D.I did
A.sit B.be sit C.sitting D.sits
A.another B.others C.some D.more
A.bachelor B.master C.doctor D.postdoctor
A.absent B.absentee C.absenting D.absence
A.principles B.principals C.principality D.prince
A.not B.never C.no D.none
A.source B.resource C.force D.grocer
A.up B.down C.below D.over
A.her a card B.to her a card C.card to her D.to her card
A.up B.off C.on D.in