-The terrible accident might not have happened had the driver been more careful.
--But he _____.
A．wasn’t B．didn’t C．hadn’t D．doesn’t
The article gives several ______ about why we should build up the harmonious society.
A．explanations B．expressions C．introductions D．directions
These two kinds of ways are totally different in nature, and we should not _______ the two.
A．confuse B．embarrass C．disappoint D．discourage
Wang Lin behaves well at table. This family tradition has been _____ for generations.
A．taken down B．turned around C．passed down D．picked up
The government must be very ______ about setting a policy, making no decision until they are quite sure it is the right one.
A．particular B．concerned C．cautious D．certain
The president said that it was a great honor for him ______ his country in the past two weeks.
A．to visit B．to be visiting C．to have visited D．to have been visited
