Observations were made______the children at the beginning and at the end of pres

游客2025-05-03 1

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、at

答案 B

解析这里的of短语实际上应跟在observations的后面(make observations of the children)，变成被动态就成了本题这个句子，且由于of的宾语太长，所以后移。

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Atthebeginningofthenineteenthcentury,workersweredifferentiatedbys