A baby might show fear of an unfamiliar adult, _______ he is likely to smile and reach out to another infant.
A、ifB
暂无解析
Thewealthofacountryshouldbemeasured________thehealthandhappinessofitspeopleaswellasthematerialgoodsitcanproduce.
_______ the movie I would have finished my paper last Sunday.
________somanypeopleintheUnitedStatesbeenoutofworkastoday.
WhenIcamethroughthecustomsattheairport,Ihadtopay________onaclockIhadbought.
Becareful,_______you'llfalldown.
