【单选题】
A ()is very much like an ordinary telephone.
A、VHF set
B、radar
C、GPS
D、sextant
A、VHF set
B、radar
C、GPS
D、sextant
A、Thank you very much. B、Post office is over there. C、I'll be coming. D、By air mail, please.
A、It's very nice. B、It's a birthday present from my parents. C、It costs fifty pounds. D、It's a bargain.