It was because of the bad weather __________ the football match had to be put off.(推迟)

下列各句中，没有语病的一句是

Millie will go to the ________to exchange some money for US dollars.

I like your new leather boots! —Thanks．I had to try on almost a dozen pairs ______ I decided to get them

Some retired people have nothing to do.They often get together and ___for hours talking about their past experiences.