题目内容
Dr. Baffin has two sons, _____ are scientists.
A. both of them B. they C. both of who D. both of whom
D
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口算小状元口算速算天天练系列答案题目内容
Dr. Baffin has two sons, _____ are scientists.
A. both of them B. they C. both of who D. both of whom
D
口算小状元口算速算天天练系列答案