单项选择题 This superb steak house has been a () forover fifty years.A. selectionB. B.locationC. landmarkD. footmark

单项选择题 Could I help you with the heavy box? You look so-fired.()I can manage it.A. No, thanks.B. Yes, please.C. All right.

单项选择题 互联网中，计算机互相连接的主要目的是（ ）