问题
Could you tell me ______—Usually one hour and a half.
A:how long it takes to fly to Shanghai
B:how long it took to fly to Shanghai
C:how long does it take to fly to Shanghai
D:how long did it take to fly to Shanghai;
B:how long it took to fly to Shanghai
C:how long does it take to fly to Shanghai
D:how long did it take to fly to Shanghai;
正确答案是：
