A fast food restaurant is the place___,just as the name suggests,eating is performed quickly.
句意：快餐店是个,正如它的名字所示的那样（顾名思义）,是个“吃”的动作被执行得很快的地方.
让我们来分析句子结构=V=
主句；A fast food restaurant is the place.
the place的定语从句：(in the place)eating is performed quickly.
可知先行词the place在句中做状语,则选where B.
因为这是两个句子,两个句子需用连词连接,there是不可以做连词的,所以不能用.
另外,just as the name suggests,是一个插入语,与句子主干无关.