【题目】All those entering and leaving the country shall a search by the guards at the port.
A. object to B. contribute to C. submit to D. apply to
在线课程【答案】C
【解析】
考查动词辨析。A. object to反对；B. contribute to有助于；C. submit to服从；D. apply to适用于。句意：凡进出境的，都要接受口岸卫兵的查验。故C选项正确。