As she is a visitor to our house, we look on her as a part of our family.
A. fluent
B. frequent
C. unexpected
D. friendly
网友回答
A. fluent
(答案→)B. frequent
C. unexpected
D. friendly
解析：句意：因为她经常到我们家来，所以我们把她看作我们家的一员。Fluent流利的；frequent频繁的；unexpected想不到的；friendly友好的，选B。