The book was written careful observations and detailed studies. A. on the ground of B. ——青夏教育精英家教网—

摘要： The book was written careful observations and detailed studies. A. on the ground of B. on behalf of C. on average D. on the basis of

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28. The book was written _____ careful observations and detailed studies.

A. on the ground of B. on behalf of C. on average D. on the basis of

The book was written _____ careful observations and detailed studies.

A. on the ground of B. on behalf of C. on average D. on the basis of

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