兩個逗號中間是補充描述 ,整段去掉也不影響句子結構
the Sherman tree 這種樹,單數,用is
The General Sherman Tree, the largest of all the giant sequoias, is reputed to be the world's largest living thing.
回1F 因為這整句沒動詞
19. The General Sherman Tree, the larges..-阿摩線上測驗