call at到…进行短暂访问
He called at Mr.James this afternoon.
他今天下午到詹姆斯先生家去拜访了他.
call in叫(某人)进来; 来访
Call in this evening if possible.
可能的话今晚来一趟.
找〔请〕来
How many friends will you call in?
你将邀请多少位朋友?
call on拜访(某人)
He often calls on me.
他常常来拜访我.