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A- they did know how to use a telescope before the class. b- I watch the teacher's explanation about comets. c- she does believe there's life on other planets. d- my teacher did explain about gravity in the last science class. e- the American astronauts were on a mission in space. f- she was talking to the people about the city pollution.
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b- I watch the teacher's explanation about comets.
c- she does believe there's life on other planets.
d- my teacher did explain about gravity in the last science class.
e- the American astronauts were on a mission in space.
f- she was talking to the people about the city pollution.