is recorded in the history book Diaoyu Island has belonged to China since ancient times

问题补充：

is recorded in the history book , Diaoyu Island has belonged to China since ancient times.

A. As

B. That

C. Which

D. What

答案：

(答案→)A. As

B. That

C. Which

D. What

解析：本句考察的是非限制性定语从句，that不能引导非限制性定语从句。Which引导的非限制性定语从句不能放在句首。What不能引导定语从句。As可以指代一句话的内容，引导非限制性定语从句，放在句首，表示“正如…”；句义：正如这本历史书里所记录那样，自古以来钓鱼岛就属于中国。故A正确。