摘要： So far nobody has claimed the money in the library. A. discovered B. to be discovered C. discovering D. having discovered Key: 1-5 CAAAA 6-10 BCDAA 11-16 BACBBA
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Selecting a mobile phone for personal use is no easy task because technology ____ so rapidly.
A.will change B.has changed
C.will have changed D.is changing
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Mary is the only one of the students in our class who ____ to the Great Wall so far.
A. is B. has been C. are D. had been
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