I was often a little tired after a day's work and watching TV demands very little effort．______

I was often a little tired after a day's work and watching TV demands very little effort．________，there are too many people in my family．

A.Fortunate

B.Unfortunate

C.Fortunately

D.Unfortunately

答案及解析： D

解析：

副词修饰全句作状语，且上下文之间为转折关系。