I am that you helped me find my book.[ ]A. careful B. beau

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I am        that you helped me find my book.[     ]
A. careful
B. beautiful
C. useful
D. grateful

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举一反三

He was         the new invention and asked the scientist about it over and over again.     [     ]
A. curious about
B. angry with
C. friendly to
D. strict with

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It"s our duty to keep our environment____.   [     ]
A.clean
B.cleaning
C.to clean
D.cleanly

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—Where is the paper I put on the table just now?
—Sorry. I thought it was         paper and threw it away.[     ]
A. waste
B. helpful
C. useful
D. beautiful

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Though the weather is very cold,those flowers in the garden are still     _   .    [     ]
A. dying
B. dead
C. live
D. alive

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She was    ___ buy the new book in that book store.[     ]
A. eager for
B. eager to
C. eagerly for
D. eagerly to

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