After designing more experiments,they were able to clarify the procedure bees communicate information that they use to find and fetch food. A.by which B.in which C.by that D.for which 题目和参考答案——青夏教育精英家教网—

题目内容

After designing more experiments,they were able to clarify the procedure　　 bees communicate information that they use to find and fetch food.

A.by which　　　　　　　　　B.in which

C.by that　　　　　　　　　　D.for which

解析:

by which是介词+which构成的定语从句，表方式。

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