翻译：应选择主人方便的时间前去拜访,拜访前也应告知主人,让主人有所准备.（翻译成英文）谢谢!

You should choose the time when it is convenient for the host.You should let the host know ahead of time befor you visit the host so the host can prepare for it

Should choose to master convenient time to visit, visit the former should also inform the master, let the owner prepared

You should choose a convenient visiting time for the host. Inform the host of your visit so that he can get prepared.
You ought to find a proper visiting time for the host. Before you pay him a visit, tell him of your visti so that he can prepare for it.