Yuan Longping is a scientist __________ is famous for the development of rice.[ ]

As the winter holidays come, I’d love to sleep all day at home _____ have sports outdoor(户外).[ ]

Have you done your chores? We’re leaving ________an hour．[ ]

I guess Tom and his sister Celia enjoyed ______ at the party.

Lily called me ___ Friday morning and told me she was having a birthday party ___ me tomorrow. [ ]