Johnson had made up his mind to give it up，but on______second thought he determined to try______ third time.

A．/；a

B．/；/

C．a；a

D．the；a

机动车向右转弯、路边停车或向右变更车道时应（）。

A、减速鸣号

B、伸手示意其他车辆注意

C、打开右转向灯

D、前后无车辆时可随意