The programme gives students the（）to learn more about global warming.

（），Edison began experimenting with some thing which he had made himself.

A.On August12，1877
B.In August12，1877
C.At 12August，1877
D.In 1877，August，12

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Most people do not believe in （）individual happiness for the sake of the children.

A.sacrifice
B.sacrificing
C.being sacrifice
B.to sacrifice

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