这个不定冠词的用法正确吗?(atopicforaninterestingresearchpaper)
Canyouthinkofanideafor(a)topicforaninterestingresearchpaper?
上句中,atopic是否应该修正为thetopic(foraninterestingresearchpaper)?
还有这句:Afterthemanstandingovertherewaspunchedinthenose,hesuffered(a)bloodynose.
是否应该改成(the)bloodynose?