单项选择题

A．To escape from their enemies.
B．To catch more food.
C．To use their developing flippers.
D．To swim.
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单项选择题
A．The Republican Party has always been supported by the Democratic Party.B．The Democratic Party is associated with free enterprise in the economy.C．The Democratic Party is the main opponent of the Republican Party.D．The Republican Party has never lost the presidency.
A．The Republican Party has always been supported by the Democratic Party.
B．The Democratic Party is associated with free enterprise in the economy.
C．The Democratic Party is the main opponent of the Republican Party.
D．The Republican Party has never lost the presidency.
单项选择题
A．Castles’’ structure and the eating habit in them.B．Castles’’ structure and the people who lived in them.C．Castles’’ structure and the life in them.D．Why people built castles and their structure.
A．Castles’’ structure and the eating habit in them.
B．Castles’’ structure and the people who lived in them.
C．Castles’’ structure and the life in them.
D．Why people built castles and their structure.
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