_______ I admit that there are still some problems about the traffic in this area, I don't mean that it can't be solved.
| A．While | B．Until | C．Unless | D．As |
I clean my room once a week, and the job _____ me two hours．
| A．costs | B．takes |
| C．pays | D．spends |
He may not even drink water at night, _______ swallowing insects possibly floating on the surface．
| A．in case of | B．for fear of |
| C．for the sake of | D．in line with |
—Excuse me, could you tell me where the post office is?
—__________, but I’m a stranger here．
| A．I’m not sure | B．I’m sorry |
| C．That’s righ | D．I’m afraid not |
—Mr．Wang was caught in a snowstorm yesterday．
—I have known that, and ______ his new car was completely destroyed．
| A．hopefully | B．fortunately | C．thankfully | D．unfortunately |
This is the first time that I _____ the summer palace．
| A．had visited | B．have visited |
| C．visit | D．visited |