C前面Is this college这里最容易让人误解了,去的地方时“这所大学this college”而不只是college,这样变过来就是this college is----------（they went to ）他们去的?后面缺少宾语是啊，which可以做宾语啊但是which不能做表语吧？主句缺少表语呢，而且还得再定于从句中作宾语，先行词为the one宾语从句的引导词不能用that