(2014·安徽皖南八校三联)A positive attitude，________with willingness to seek appropriate help and exercising solid study habits，will do much to determine how well you do in your studies.

I am really sorry if my comments on the matter ____ you. 

— Why does he walk like that? It seems that he has great difficulty in walking.  — Because he got ____ in an accident three years ago.

Dark clouds _______ the sunlight. It seemed as if it was going to rain.

 American women were______ the right to vote until 1920 after many years of hard struggle.