【单选题】If you are in another person's home and want to smoke, what should you do?
A.
You had better give the host (男主人) a cigarette.
B.
You should ask the host or hostess if they mind your smoking.
C.
You shouldn't light up until you get their promise.
【单选题】The direction in which a vessel is steered is the course. The path actually followed is the ______.
D.
course over the ground
【单选题】The answer is connected with the main use______ the body makes of food—to supply the energy for movement.
【多选题】商务交往中私人问题有"五不问"的要求,下面正确的是( )