A.this
B.that
C.one
D.it
A.this
B.that
C.one
D.it
开始考试点击查看答案A.that; it
B.it; it
C.that; what
D.it; what
开始考试点击查看答案A.all
B.everything
C.it
D.themselves
开始考试点击查看答案A.this
B.that
C.there
D.it
开始考试点击查看答案A.this
B.it
C.those
D.one
开始考试点击查看答案A.that
B.this
C.it
D.one
开始考试点击查看答案A.one
B.it
C.some
D.them
开始考试点击查看答案A.What is required
B.What requires
C.It is required
D.It requires
开始考试点击查看答案A.it difficult; keep in touch
B.it hard; lose touch
C.difficult; get in touch
D.hard; be in touch
开始考试点击查看答案A.that; one
B.it; it
C.that; it
D.it; one
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