out _______.
A. the exact number of swans and cygnets
B. how a local school project is going on
C. how much damage the swans and cygnets suffer
D. how education and conservation are carried out along the Thames 4.Which of the following is the main idea of the passage?
A. Britain’ s Queen is concerned about swans.
B. Britain’ s Queen orders a count of swans.
C. An old tradition in Buckingham Palace.
D. Queen Elizabeth will count swans herself.
5.The underlined word “tributaries” can be best replaced by _______.
A. districts
B. banks
C. trees
D. branches
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