S of bees are flying near the bee-hives. 查看更多

 

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 The cell phone is __________ useful invention of the last 50 years, however, some scientists __________ the disappearance of bees.

A. a; blame it for                                    B. an; blame it for

C. a; are blamed it for                                D. an; are blamed it for

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The necklace that she lost is very expensive. It's of great _______.

A. valuable          B. value

C. valueless         D. unvaluable

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This book shows the author's ________of learning.

[    ]

A. deep   B. deeply   C. depth   D. depths

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The necklace that she lost is very expensive. It's of great _____.
[     ]
A. valuable
B. value
C. valueless
D. invaluable

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 Thank you very much. It's ____ of you.
  A. kindest         B. a most kind         C. the most kind         D. most kind

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