英语语法选择题,请问这道题选什么?考的那个语法点?
Wesupplydifferenttelephonecommunicationproducts,someof________areparticularlyusefulfo...
We supply different telephone communication products, some of ________ are particularly useful for small businesses.
A. what B. which C. whom D. these 展开
A. what B. which C. whom D. these 展开
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