Is this the museum ____ the exhibition was held.
问题描述：
Is this the museum ____ the exhibition was held.
that为啥不行
答
还原成为陈述句：This is the museum ____ the exhibition was held.the museum后接的是定语从句,如果要用that,句中应该缺少主语或宾语或表语,而the exhibition was held是完整的,所以得用关系副词where,相当于in wh...能细说一遍吗，这俩个没有区别啊Is this the book （that you lent him本句定语从句lent him后面还要加一个宾语book，所以用that代替book）?Is this the museum (where the exhibition was held定语从句结构完整了).