— Could you tell me ______ it takes to go from here to Beijing by air?
— About 50 minutes.
A. how many B. how much C. how long D. how soon
【答案】C
【解析】句意：——你能告诉我乘坐飞机从这里到北京需要多长时间吗？——大约50分钟。how many多少，how much多少钱，how long多长时间，how soon多久，根据About 50 minutes可知此处对时间段提问，故用how long。故选C。