题目

兴水利，除水害，事关人类生存。“它的规模从表面上看，远不如长城宏大，却注定要稳稳当当地造福千年。”由于它的修建，使成都平原成为富饶的“天府之国”，“它”是指我国古代的哪一项水利工程？（   ） A.都江堰       B.郑国渠       C.灵渠    D.大运河 答案：A. It was the fact _______his father was ill in hospital_________ worried him and kept him awake for a whole night .A．which ; thatB．which ; whichC．that ; whichD．that ; that