【C16】
A.that
B.what
C.why
D.how
【B5】A.thatB.whatC.howD.when
()they are doing has never been done before.A. ThatB. WhatC. WhyD. Whether
A.whenB.whatC.whyD.how
【C15】A.howB.whatC.whyD.which
【C2】A.thatB.whatC.callD.those
收集求助者资料时围绕的七个问题中最重要的是()A.whenB.whatC.whyD.who