A. once B. always C. usually D. never 答案:D 指导:由转折词but可以断定.“从来没有对大猩猩进行过语言方面的研究.——青夏教育精英家教网—

摘要： A. once B. always C. usually D. never 答案:D 指导:由转折词but可以断定.“从来没有对大猩猩进行过语言方面的研究.

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All of the flowers now raised here have developed from those _____ in the forest.

A. once they grew　　　　　 B. they grew once

C. that once grew　　　　　 D. once grew

All of the flowers now raised here have developed from those _______ in the forest.

A. once they grew　　　　　 B. they grew once

C. they once grew　　　　　 D. once grew

All of the flowers now raised here have developed from those ________ in the forest.

A. once they grew　　　　　　　　　　 B. they grew once　　　　　　　　　　 C. that once grew　　　　　　　　　　 D. once grew

A. once they grew　　　　　　　　　　 B. they grew once　　　　　　　　　　 C. that once grew　　　　　　　　　　 D. once grew

______ he is determined to do something, no one is able to make him ________.

A. Once; give up　　　　　 B. Although; give in

C. As long as; give out　　　 D. If; give away

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