(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.

(2014·河北高三教学质量监测)While working outdoors，Linda was________by the heat and fell to the ground，unconscious.

Many single parents      with the dilemma of dividing time between work and children。

I’m familiar with you because your name ____ in our yesterday’s conversation many times.

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