1.You should give your thanks to the host and hostess after (entertain)______ in their home.2.Professor Blake, please tell me your departure and (arrive)_______ times.3.Well, Miss Green, here is my card. (call)____ me if you need any help, please.4.It's easy to get (lose)____ in a city as crowded and busy as this one.5.You may (feel)______ free to use my computer whenever you want to.