（）13.Noteacherandnostudent______．A.areadmittedB.isadmittedC.areadmittingD.isadmittingD.were（）15.Whenandwheretobuildthenewfactory_____yet.A.isnotdecidedB.arenotdecidedC.hasnotdecidedD.havenotdecided（）16.

　　（）13.Noteacherandnostudent______．

　　A.areadmittedB.isadmitted

　　C.areadmittingD.isadmitting

　　D.were

　　（）15.Whenandwheretobuildthenewfactory_____yet.

　　A.isnotdecidedB.arenotdecided

　　C.hasnotdecidedD.havenotdecided

　　（）16.Thewriterandsinger______here.

　　A.isB.areC.wereD.do

　　（）23._____ofmybrothersarereporters.Coveringevents,meetings,orsportsmeetings______theirduty.

　　A.Each,areB.Both,is

　　C.Neither,areD.None,is

　　BAAB