I              some clothes to charity because they were too small for me.    [ ]

A. gave out                    

B. gave away    

C. gave off                    

D. gave up

幽门梗阻所致持续呕吐，可导致

A．低氯低钾性酸中毒

B．低钾性酸中毒

C．低氯高钾性碱中毒

D．低氯低钾性碱中毒