A．What
B．Which
C．It
D．They
请帮忙给出正确答案和分析，谢谢！
A． thatB． whichC． itD． who
A．whatB．whichC．thatD．since
【29】A．whatB．whichC．thatD．if
材料题请点击右侧查看材料问题 查看材料A.whatB.whichC.itD
【C4】A．thatB．whichC．itD．what
【C7】A．whatB．whichC．thatD．as
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