摘要： Professor Black has been working in the forest for years, to the research of wild plants and animals. A. devoted B. devoting C. to devote D. and devote
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Professor Black has been working in the forest for years, _____ to the research of wild plants and animals.
[ ]
A. devoted
B. devoting
C. to devote
D. and devote
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B. devoting
C. to devote
D. and devote