A.It
B.There
C.This
D.That
A.one
B.this
C.it
D.that
开始考试点击查看答案A.What is required
B.It is required
C.What requires is
D.It requires
开始考试点击查看答案A.that
B.it
C.these
D.them
开始考试点击查看答案A.themselves
B.them
C.us
D.ourselves
开始考试点击查看答案A.it is
B.this
C.it
D.that is
开始考试点击查看答案A.one
B.it
C.that
D.those
开始考试点击查看答案A.nothing
B.none
C.no one
D.neither
开始考试点击查看答案A.that
B.one
C.it
D.the one
开始考试点击查看答案A.it
B.one
C.some
D.any
开始考试点击查看答案A.A.the one that
B.one that
C.the one
D.one
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