根据短文内容，从各题所给的四个选项中选择一个最佳答案．

Once there was a rich man called Chulong．He was very greedy（贪婪的）．

One day he was walking in his garden．He saw a（21） 　　bird．It was very small，however，it had very beautiful and colorful feathers（羽毛）．It also had a sweet （22） 　　．Chulong had never seen such a bird in his life．He （23） 　　went near the bird and caught it．Now the bird began  to speak．"Why have you caught me？"The bird asked．"I want to sell you to make money，"（24） 　　 Chulong．"Don't dream （25） 　　 making money by selling me，"said the bird．"You can't sell me．（26）      will buy me．Because I'm in imprisonment（因禁），I lose my beauty．"Then it turned into a black bird．

The bird then suggested，"Well，set me free．In return I will give you three pieces of advice．They're simple （27） 　　useful．"The man agreed and set the bird free．It flew up at once．Then it sat in the tree．（28） 　　color started changing．It became beautiful again．The bird added，"The first one is，never easily believe （29） 　　others say．The next one is，never be upset（沮丧的）about something you don't have．The last one is，never（ 30） 　　the things you have in hand．"

After saying these words，the bird flew away and disappeared．The man went away in silence．

21．A．huge	B．deaf	C．strange	D．sick
22．A．voice	B．look	C．memory	D．smell
23．A．angrily	B．slowly	C．sadly	D．safely
24．A．repeated	B．reported	C．required	D．replied
25．A．of	B．for	C．by	D．at
26．A．Somebody	B．Anybody	C．Everybody	D．Nobody
27．A．so	B．or	C．but	D．as
28．A．My	B．His	C．Her	D．Its
29．A．what	B．which	C．whose	D．whom
30．A．put off	B．give up	C．hand out	D．take down