51__________is quite obvious that there is no water on the Mars.
A.There
B.It
C.That
D.This
开始考试练习点击查看答案52The number 13 is a special number, ____, I think, that will be hated by the foreigners.
A.what
B.it
C.which
D.one
开始考试练习点击查看答案53Mr. Oven has three children, one of whom is a child of six, ___ twins of twelve.
A.another
B.other
C.the others
D.others
开始考试练习点击查看答案54---There must be a dozen pens in this house but I can never find one when I need one. --- Keep looking. ____ is sure to turn up.
A.one
B.it
C.that
D.that
开始考试练习点击查看答案55Neither __ nor ___ liked the idea of going on foot.
A.him, me
B.her, we
C.I, them
D.she, I
开始考试练习点击查看答案56----Are the new rules working ? ----Yes. _______books are stolen.
A.few
B.More
C.Some
D.None
开始考试练习点击查看答案57The cost of renting a house in central Xi’an is higher than ____ in any other area of the city.
A.that
B.this
C.it
D.one
开始考试练习点击查看答案58Legend has ______ that CaoCao, King of Wei kingdom in the Three Kingdoms period, built 72 tombs to confuse tomb diggers.
A.it
B.this
C.them
D.itself
开始考试练习点击查看答案59"How many elephants did you see?" "_____".
A.None
B.No one
C.Not many ones
D.No many
开始考试练习点击查看答案60—Now that you like computers very much, isn’t it a good idea to get ______? —Well, I’d like to but I can’t afford that expensive a computer at present.
A.one
B.them
C.it
D.that
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