Under the environment of fierce competition, the only way John could imagine _______ stress was to get tougher by making greater efforts.
______ proves that Jack is really enthusiastic and cautious.
Pro. Smith will give us a report to ______ the world present economic problems.
— The water was left running all night long. — It seemed that John ______. He was the last to do some washing.
Your luggage is overweight, so you must decide what to ______.
Not for a moment ______ that this disease was caused by certain virus.