根据语境或句意，从方框中选择恰当的短语完成下列各句．

by accident，on weekends ， thanks to， put off，making a difference ， all of a sudden

（1）We shouldn't 　　what we have to do today till tomorrow．

（2）Tea， the most popular drink in the world， was invented 　　．

（3）Nowadays， plenty of women around the world are doing great things and 　　．

（4）The earthquake happened 　　， but luckily no one was injured in the village．

（5） 　　the government， many poor families in the countryside are leading a better life．