非限制性定语从句 【新知导引】 认真观察下列句子，并体会非限制性定语从句的用法 1. Mao Zedong wrote a poem ________he dreamed of “walls of stone to hold back clouds and rain till a smooth lake rises in the narrow gorges”. 2. The Three Gorges Dam, ______ is the biggest construction project in China since the building of the Great Wall and the Grand Canal, has been built to control flooding.

in which

which