2. 外语
  3. Observations were made______the children at the beginning and at the end of preschool and first grade.

Observations were made______the children at the beginning and at the end of preschool and first grade.

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问题 Observations were made______the children at the beginning and at the end of preschool and first grade.
选项 A、towards
B、of
C、on
D、with
答案B
解析 本题为固定搭配题。make observation of意为“对……进行观察”。所以答案为B)。
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成人本科学位英语

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