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
A．It was getting dark.B．He was afraid of being blamed by his friend.C．The birds might have flown away.D．His friend would arrive any time.
A．It was getting dark.
B．He was afraid of being blamed by his friend.
C．The birds might have flown away.
D．His friend would arrive any time.
单项选择题
A．Because he didn’’t do well last time.B．Because he is usually busy.C．Because he doesn’’t know what he got last time.D．Because he isn’’t familiar with the woman.
A．Because he didn’’t do well last time.
B．Because he is usually busy.
C．Because he doesn’’t know what he got last time.
D．Because he isn’’t familiar with the woman.
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