The pressure _____ causes Americans to be energetic, but it also puts them under a constant emotional strain (过度紧张).
In my opinion, he is a(n) ________ person, that is, he says what he thinks.
Only after Mary read her composition the second time________ the spelling mistake.
Most people think that it is ________ to spend some time surfing the Internet, but we shouldn't be too dependent on it.
—What happened over there? —They argued ________ the waiter ________ the price of the meal.
Before my father moved off, he told me again and again that I should ________ the rules and regulations of the school.