单项选择题

A．To limit discussion on heating bills.
B．To determine temperature in homes.
C．To prevent heat loss.
D．To convert homes to electric heat.
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单项选择题
A．Successful language learners are more intelligent than others.B．Some people have good teachers and good books.C．Successful language learners use special techniques.D．Some people learn grammar more quickly than others.
A．Successful language learners are more intelligent than others.
B．Some people have good teachers and good books.
C．Successful language learners use special techniques.
D．Some people learn grammar more quickly than others.
单项选择题
A．Bicycles and cars.B．Building codes.C．New housing construction.D．Energy conservation.
A．Bicycles and cars.
B．Building codes.
C．New housing construction.
D．Energy conservation.
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