31.-There must be a dozen pens in the room ,but I can never find one when I need them. -Keep looking is sure to turn up. A.One B.It C.That D.This 查看更多

 

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— There must be a dozen pens in the room,but I can never find one when I need them.
— Keep looking. _____ is sure to turn up.

[     ]

A. One
B. It
C. That
D. This

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―There must be a dozen pens in the room ,but I can never find one when I need them.

―Keep looking        is sure to turn up.

       A.one                    B.It                        C.That                   D.This

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—There must be a dozen pens in the room ,but I can never find one when I need them.

—Keep looking        is sure to turn up.

A.One   B.It      C.That  D.This

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