分类：教育/科学-学习帮助
问题：单项选择3.isthisthebird_________?a.f 
3.is this the bird _________?
a.for that you are looking b.that you are looking for c.for that you are looking for d.that you are looking
回答：b

定语从句中，介词不能和关系代词that前后连用，所以排除a.c

不选d在于　它忽视了　look for 的　固定搭配问题了．