it's our custom to greet people by giving them flowers请分析相关语

People greet their mothers ( ) giving gifts.A.to B.by C.at D 翻译In our culture,it's the custom for the bride's father to p People in China celebrate it by giving presents 对by giving p It's our job to take care of them for our whole lives. 用所给词的适当形式填空.Give our _____ (greet) to the people Sichuan. It's a custom that people in Brazil ( ) when they meet for t It's a custom that people in Brazil _____when they meet for The old need ( ) care,so it's our duty to look after them we 106716:so it's one of our priorities to help them work toget In summer,it's very hot.People often use an ( )to keep them it is a traditional custom for Chinese people to __1_ with c People in China celebrate it"by giving presents".（对引号部分提问）