Those children can take care () themselves now填上介词

Those children can take care ( of ) themselves now.那些孩子现在可以照顾自己了.take care of 表示“照顾,照料”.
You are busy on weekdays.How ( about )　weekends?工作日你很忙,那么周末怎么样?How about 或者what about 表示“.怎么样?”