Stress can be extremely damaging to your health. Exercise, _, can reduce its effects.

At the crossroads, you have to drive very ________ to avoid traffic accidents.

Drunk driving used to occur _______, but now it is under control.  

—What’s your plan for the future?—I hope to get a job in the local newspaper at first and ______ work for China Daily.

Carl is starting college in September. ______, he’s traveling around  Europe.