单选题：When I talked about the thing, I felt Jane watching me uncom..

—How far apart do they live?—________I know, they live in the same neighbourhood.[ ]A. As long asB. As far asC. As well asD. As often as

Schools in the east tend to be better equipped, ____ those in the west are relatively poor.[ ]A. AsB. While C. WhenD. But

_______he will offer us enough help doesn't matter a lot to our success. [ ]A. IfB. WhetherC. BeforeD. How

Getting rid of bad habit is________forming a good one.[ ]A. an effort much asB. much an effort asC. as an effort much asD. as much an effort as

As the sea ice melts sooner each swimmer,polar bears are forced to come ashore earlier and face food shortages _____ they have stored enough fat to last them through the season.[ ]A.beforeB.unlessC.sinceD.until