这句话怎么办?其中which 可不可以用that 替代?Dr.Clark spent three years in the National Library during which time he collected most of the data he needed for his new book.
问题描述：
这句话怎么办?其中which 可不可以用that 替代?
Dr.Clark spent three years in the National Library during which time he collected most of the data he needed for his new book.
答
可以
答
不可以
答
不可以,这属于介词提前的情况
介词后面关系代词的选择只需看先行词是人还是物,人用whom物用which