30.There are 103 elements found in nature,____ are metals.
问题描述：
30.There are 103 elements found in nature,____ are metals.
A most of which B most of them
C most of that D most which
选A?
为什么不选B？
答
选A most of which
which指前面的103 elements
如果句中没有逗号,就选B
There are 103 elements found in nature and most of them are metals.