(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.

(2014·安徽省芜湖三校一模)A recent study has  ________an unexpected conclusion that the African elephant should be divided into two different species.

It was not until Tom took off his dark glasses that I _____ him.

-How long have you been in the room?- Just a few minutes. My cousins ___home together with me.

 After working for two years, Tim Martin was ______ as the top manager in charge of the company.