按桥面所在的位置可把拱桥分为（）、中承式拱桥和（）。
参考答案：上承式拱桥；下承式拱桥
—Excuse me, I wonder if you can help. I _______ my ID card.
—But where did you lose it?
A. have lost
B. lost
C. had lost
D. lose
