The three men tried many times to sneak across the border into the neighboring country_____ by the police each time.
C
暂无解析
_____ no cause for alarm, the old man went back to his room.
Under this（）pressure some of the rocks even became liquid.
_____ if I had arrived yesterday without letting you know beforehand.
I don’t like _____ bills but when I do get them I like _____ them promptly.