ThereasonIwenttotakethatclassistheprofessorissuppA)why,forB)why,soC)why,thatD)that,because

Question

The reason _______ I went to take that class is ______ the professor is supp
A) why,for B) why,so
C) why,that D) that,because

Answer 1

选c.
Why 是关系副词引导定语从句修饰reason,后面that 引导一个表语从句.
即句子主干实际上是：The reason is that the professor is supp ...只不过在中间插了一个定语从句.