单项选择题


A．keep
B．retain
C．maintain
D．reserve
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单项选择题
A．doneB．metC．reachedD．dealt
A．done
B．met
C．reached
D．dealt
单项选择题
Recent studies by the Council of Europe show that ______.
A．it is only in Britain that wildlife needs more protection
B．certain species of reptiles and butterflies in Europe need protecting
C．there are fewer species of reptiles and butterflies in Europe than elsewhere
D．all species of wildlife in Europe are in danger of dying out
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