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【华慧考博】考博英语每日一练（7.27）考博加油！
1. Scientists generally hold that language has been so long in use that the length of time writing is known to cover is ______ in comparison.A. overwhelming
B. uninspiring
C. astounding
D. trifling
2. I’m afraid this painting is not by Picasso. It’s only a copy and so it’s ______.
A. priceless
B. invaluable
C. unworthy
D. worthless
【单句改错】
1. Every individual cell, whether its exists as an independent microorganism or is part of a complex creature, has its own life cycle.
2. The need for more food discourages development of better technology which naturally keeps more people alive.
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