The Three Gorges Dam, which is worth ________, is being built. I'm sure it will be worth ________ as well.A.billions of yuan, to visitB.billions of yuan, visitingC.billions of yuan, being visitedD.billions of yuan, to be visited
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B解析【巧解导析】worth之后的非谓语动词只能是动名词的主动式，即v-ing，以其主动式表达被动含义．