1.Without fact,we can't form a worthwhile opinion for we nee

1.Without fact,we can't form a worthwhile opinion for we need to have factual knowledge ______ our thinking.A.which to base onB.which to be base onC.upon which to baseD.with which to base on2.We have all expreienced occasions ______ we have spoken our minds to someone,telling them exactly what we feel.A.whereB.whichC.thatD.when3.Tom comes to school by car every day,______ do many other teachers who live in the suburban areas of Chendu.A.whichB.asC.whenD.though