1.Withoutfact,wecan'tformaworthwhileopinionforweneedtohavefactualknowledge______ourthinking.A.whichtobaseonB.whichtobebaseonC.uponwhichtobaseD.withwhichtobaseon2.Wehaveallexpreiencedoccasions______wehavespokenou

　　1.Withoutfact,wecan'tformaworthwhileopinionforweneedtohavefactualknowledge______ourthinking.

　　A.whichtobaseon

　　B.whichtobebaseon

　　C.uponwhichtobase

　　D.withwhichtobaseon

　　2.Wehaveallexpreiencedoccasions______wehavespokenourmindstosomeone,tellingthemexactlywhatwefeel.

　　A.where

　　B.which

　　C.that

　　D.when

　　3.Tomcomestoschoolbycareveryday,______domanyotherteacherswholiveinthesuburbanareasofChendu.

　　A.which

　　B.as

　　C.when

　　D.though