50. The Englishman has a very good ear _____ music. You can ask him for some advice.
| A．at | B．of | C．for | D．In |
31．A study shows that students living in non—smoking dorms are less likely to——the habit of smoking．
| A．make up | B．pick up | C．draw up | D．turn up |
30．——is a good chance that he is willing to allow U8 to join in the ball game．
| A．There | B．It | C．That | D．This |
29．一Have you read this book?
--Yes．But that one is—————————worth reading．
| A．better | B．more | C．best | D．much |
28．You'd better tell John tO bring the latest Readers Digest t}le next time he——．
| A．comes | B．is coming | C．will come | D．is about to come |
27．一I’m applying for a post in the famous company．
一—————.
| A．Congratulations | B．Good luck | C．All right | D．You’re welcome |