单项选择题

A．He’’s studying for a test.
B．He lost his notes.
C．He missed the class.
D．He’’s doing research on alternative.
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单项选择题
A．Mary earned the prize.B．Mary has granted the prize.C．Mary fails in the speech contest.D．The man doesn’’t think Mary deserves the prize.
A．Mary earned the prize.
B．Mary has granted the prize.
C．Mary fails in the speech contest.
D．The man doesn’’t think Mary deserves the prize.
单项选择题
A．A more economical diesel fuel.B．Characteristics of a new type of fuel.C．Where a new energy source is located.D．How to develop alternative energy sources.
A．A more economical diesel fuel.
B．Characteristics of a new type of fuel.
C．Where a new energy source is located.
D．How to develop alternative energy sources.
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