The bridge in my hometown____ was built 200 years ago was destroyed last month.

选B
The bridge in my hometown 【that was built 200 years ago 】was destroyed last month.
括号中是that引导的定语从句,修饰the bridgeD 为什么不对？我好想看到过类似句子，可以不加that当定语从句中，that作为宾语时，that可以省略；如：I like the food (that) he loves.我喜欢吃那种他也喜欢的食物。这里的that在定语从句中做宾语，可以省略。但是，定语从句中，that作为主语时，是不能省略了。如：I like the food that is delicious.我喜欢好吃的食物。这里的that在从句中做主语，不能省略。以此类推，原句中的that是作为主语代替the bridge的，the bridge（主） was built （谓），故不能省略。