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Are there any differences between human beings and animals? Scientists used to think that men were different from animals because they could think and learn．But now we know that animals like dogs，cats，rats and even birds can learn．Once in my hometown，a strange thing happened．One morning my grandma went to the door to get the milk，but to her surprise，there was little milk left．She thought the cat next door had stolen the milk．The next day，the same thing happened．She was a little angry．She went next door to talk about this with the cat’s owner，but she found that the neighbor and the cat were not at home．They were all on holiday! Who stole the milk? She thought hard．Then she asked the milkman about it the next morning．He said that other people also complained(抱怨) about it．He said that birds might be the thieves because there were seven or eight quick—moving blue birds following him when he delivered(遞送) the milk．In order not to lose milk any more，people made some boxes to put their milk in．A few days later，people found that when the birds couldn’t get into the boxes，they flew directly to the milk truck and had their meals there．How intelligent the birds are! They use theft sharp wits to hold their place in a human environment．

1．From the passage we know that         ．

A．the milkman is a thief

B．the milkman is friendly to the birds

C．the birds only love to eat my grandma’s milk

D．the birds like us human beings ale also very intelligent

2．My grandma was a little angry because                ．

A．her milk was gone again

B．the cat next door had her milk again

C．her neighbor did nothing with their cat

D．the milkman didn’t bring her enough milk

3．What does the underlined words“sharp wits”mean?

A．Beautiful wings．    B．Long feathers．

C．Intelligence．       D．Hard work．

4．When the milkman delivered the milk to every house，          ．

A．he himself took some of it        B．the birds followed him to drink milk

C．people welcomed him at the door   D．he always brought some birds with him

5．What does the writer think of the birds?

A．They are hateful．    B．They are too hungry．

C．They are clever．     D．They are as clever as cats．