It was a great pleasure for the family to move to a house with a very big garden．Betty and Tony could climb up trees，grow flowers and even play badminton．They liked to watch the birds flying among the trees in the garden．They even started to put food out to attract more birds．

Everything was fine for a few days until one afternoon there was a strange bumping noise on a window．Betty went outside and found a small bird dead on the grass．Its neck seemed to be broken．

"It must have flown into the window．"Tony said when his sister Betty called him to have a look" Ah，yes，look here．You can see the mark where it hit the window．There are a couple of tiny feathers stuck on the window．"

"Poor things!" Betty said．

During the next month，five more birds died in the same way．"Why would they fly to the windows？"They wondered．Finally they knew the truth．When the birds were flying，they couldn't see into the rooms．All they saw was the reflection（倒影） of the garden，They thought that they were flying into trees because they saw trees reflected by the window，

"Something has to be done to save the birds．"the parents decided．

At first，the family tried keeping curtains （窗帘）across the windows，but this made the room dark．Then they bought some strong black paper and cut out the shape of a hawk．They made six hawks﹣﹣one for each window．They stuck the hawks to the windows．They looked pretty and did not keep out much light，When the birds saw the hawks，they would fly away．

After that，there were no more dead birds．The family were much happier．

46．They put food out to attract birds because they 　 　．

A．	had a special garden for birds
B．	had too much bird food to feed the birds
C．	wanted to see more birds flying in the garden
D．	wanted to catch some birds in the garden

47． 　 　birds died in the garden．

A．	Six
B．	Five
C．	Four
D．	Seven

48．The bird flew to the windows because they 　 　．

A．	found the windows very big and clean．
B．	wanted to fight for more food
C．	thought there were more trees ahead
D．	wanted to go into the room

49．The underlined word "hawk" means 　 　

A．	丛林
B．	鹰
C．	山脉
D．	燕子

50．The story is mainly about 　 　

A．	why those birds died in their garden
B．	Betty and Tony were good at paper﹣cutting．
C．	how the family saved the birds in the garden
D．	the family had a new house with a big garden．