The two boys had so _____ in common that they soon became good friends.

The doctor said that mental （ ） is the major cause of his sleeping problem.

Air pollution is obviously one of the major _____ of city life.

Mary likes classical music _____ her brother likes pop music.

（ ） we have all the materials ready, we should begin the new task at once.

（ ） five hundred people are believed to have drowned.

He is the sort of businessman who would do anything in his （ ） of profit.

Only when （ ） in the afternoon （ ） able to leave.

I got so tired that I just couldn’t move a step _____.

_____ breaks the law will be punished sooner or later.

The defense computers calculate way to （ ） the enemy missiles.

Fresh air, enough exercise and nutritious food （ ） to good health.