Presenters at the seminar, one who is blind, will demonstrate adaptive equipment that allows visually impaired people to use computers. B lee (A) one who (B) one of them who (C) and one of them who (D) one of whom (E) one of which
答案是d,我选的是B,但是如果选D,one of whom is blind应该是一个句子,在这里做插入部分我觉得不合适呀,因为句子跟句子之间不是应该要有连接词连接么?