There are so many tall trees in the forest,__ A some of which measures50 metresB some of which measuring 50 metres

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There are so many tall trees in the forest,__ A some of which measures50 metresB some of which measuring 50 metres
There are so many tall trees in the forest,__ A some of which measures50 metres
B some of which measuring 50 metres

There are so many tall trees in the forest,__ A some of which measures50 metresB some of which measuring 50 metres
答案:A some of which measure 50 meters.
翻译:这森林里有如此多的高数,有一些高达50米.
句中用逗号隔开,其后又没有并列连词and等连接,说明后半部分为非限制性定语从句.
关系代词代指先行词trees,在定语从句中充当of的宾语.
其中,measures为定语从句的谓语动词,意思是“度量为...”,所以不能选用答案B,因为measuring不能单独做句子的谓语.
即:some of (which) measure 50 metres
= some of (the tall trees) measure 50 metres
注:是不是楼主打错了答案A,其中的谓语动词meausre不能使用单三形式,因为该定语从句的主语some of which表复数概念.

应选B,后面这个句子是起补充说明的作用,A本身就错,some of... ,指代前面的many tall trees, 是复数的,后面的measure不能加S

B some of which measuring 50 metres
这里是一个句子,所以不能有两个句子的结果