the sight of the scene of war, my_____ race back more than 50 years to the dark days of 1940

Zhanglin was lost in computer games during his lastyear in high school, otherwise he_______ a student at Beijing University.

There _______ a pen on the desk. It is a black pen.

When we saw the road _____ snow, we decide to spend the holiday at home.

e is more than a collection of unrelated facts;to be meaningful and valuable, ______ must be arranged to show generalizedcharacter.