---How far apart do Tom and Jack live?-----I know they live in the same neighborhood.A

问题补充：

-----How far apart do Tom and Jack live?

-----I know, they live in the same neighborhood.

A. As long as

B. As well as

C. As far as

D. As often as

答案：

A. As long as

B. As well as

(答案→)C. As far as

D. As often as

解析：考查as的短语辨析。A只要（连词短语）；B和,同，也，并；C据…；就…而言；D和…一样频繁；句意：—Tom和Jack住的相距多远？—据我所知，他们住在同一个街区里。根据句意说明C正确。