In some parts of the world, tea _______ with milk and sugar.

When he was alive, the old scientist used to say that knowledge ＿＿＿＿from practice and he gained his experience by doing a lot of practical work. 

-----Did you have a hard time traveling back home?-----Yes, it ______ for four days when I arrived in Guiyang and all the roads______ covered with ice.

Now that she is out of a job, Lucy _____ going back to school, but she hasn’t decided yet. 

—What were you doing when the telephone rang?—I ______ away my books and ______ to bed.