单项选择题

A．Because she had them put in only a few months ago.
B．Because she wanted to save the new ones for future use.
C．Because she liked worn-out plugs.
D．Because she got them well cleaned.
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单项选择题
A．They didn’t know how much each person owed for telephone calls.B．They couldn’t understand each other since they speak different languages.C．They had difficulty deciding who should cook.D．They had different lifestyles.
A．They didn’t know how much each person owed for telephone calls.
B．They couldn’t understand each other since they speak different languages.
C．They had difficulty deciding who should cook.
D．They had different lifestyles.
单项选择题
A．To test the role of environment in the development of intelligence.B．Because their parents were too poor to support them.C．Bemuse their parents passed away.D．To find out how well twins grow in separate homes.
A．To test the role of environment in the development of intelligence.
B．Because their parents were too poor to support them.
C．Bemuse their parents passed away.
D．To find out how well twins grow in separate homes.
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