Поставьте вопрос к выделенным словам, обращая внимание на место предлогов в вопросительном предложении: 1)Parents always worry about (the health) of their children. 2)Tom's friend devotes most of his time to (studying Russian). 3)Adult children must take care of (their parents). 4)The teacher talked about (irregular verbs) in class this morning. 5)That young lady is very much concerned about (her weight). 6)We slayed the longest time in (Brazil and Mexico). 7)The salesman reports to (Mr.Slater) once a week. 8)The instuctor explained to (his pupils) how to use the camera. 9)We objected to (Mr.Stewart's) plan. 10)Mr.Kennedy has invested his money in to his (children's education).