题目

Quite a few people used to believe that disaster _____if a mirror was broken. A．was sure of striking                B．was sure of having struck C．was sure to be struck           D．was sure to strike   答案：C环境保护、开发新能源是未来能源利用的主旋律．下列做法中最有利于环境保护的是（　　）A．废电池与其他废品一起填埋B．用天然气代替煤和石油C．用核能代替水力发电D．开发太阳能取代煤、天然气等能源