The medicine has many functions, ______ are unknown to us.A、some of whichB、of w

游客2024-07-03  10

问题 The medicine has many functions, ______ are unknown to us.

选项 A、some of which
B、of which some of them
C、that some of them
D、which of them

答案 A

解析 逗号后面是非限定性定语从句,由which引导,which指代functions,同时作从句的主语,此处which前有限定词some of。句意:这个药有许多作用,其中有一些是不为我们所知的。
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