_______ to danger and conflict, mentend to increase blood pressure, ________ nervous and anxious.

How heavily it rained this early morning!—Yes. But ________ of the students in our class was late for school.

I’ve _____ all the books on the shelf, but I still can’t find the one you need.

_____is his mother? —-She is a lawyer.

periment shows that proper amounts ofexercise, if __ regularly, can improve our health.