单项选择题

A．There was no garbage left to clean up.
B．There was more garbage than before and they had to work harder.
C．The river had become so clean that a lot of water birds came back.
D．The river was much cleaner and they had to search for garbage.
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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
单项选择题
A．They hired someone to stay in their home.B．They led their pets with neighbors.C．They rented their house to a student.D．They asked their gardener to watch their home.
A．They hired someone to stay in their home.
B．They led their pets with neighbors.
C．They rented their house to a student.
D．They asked their gardener to watch their home.
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