根据上下文意思,缺词填空 Ben lives with his parents.He visits his grandparents ( ) a week.

根据上下文意思,缺词填空 Ben lives with his parents.He visits his grandparents ( ) a week.
He often visits them at ( ).His grandpa ( )chess.So Ben often plays chess with him.Sometimes Ben goes ( )with his grandma.She is happy.Ben's cousin Jerry lives in Beijing.Hevisits his grandpartnts once a ( ).Jerry often ( )e-mails to Beijing.Sometimes he ( )with Ben on the Internet.