问几道英语单选题,希望得到分析解答
1.whenheenteredtheroom,hedoundMary___atthedesk,reading.
A.seating.B.sat.C.seated.D.sittingherself
为什么不选B,A看起来也可以吧,前面不是有when么..
2.ithasbeenannouncedthatcandidates(候选人)___remainintheirseatsuntilallthepapershavebeencollected.
A.can/C.could/C.may/D.shall
惭愧没看懂,为什么不能选其他选项,我看哪个都差不多...
3.onnocondition__suchunfairconditions.
A.willweaccept/B.wewillaccept
C.wearetoaccept/D.areweaccepted
怎么那么多condition,为什么不能选A
4.rf
1楼能回答的详细一点吗,2楼的你不会就不用答了,