【C19】A．thatB．thisC．whichD．what

【C15】A．thatB．somethingC．whichD．nothing

_____________ 查看材料A.whereB.thisC.whichD.that

【C2】A．thatB．in whichC．whichD．what

【C6】A．thatB．asC．whichD．as that

【C5】A．thatB．thisC．whichD．it

【C18】A．thatB．thisC．itD．I