一Have you watched the film called Cinderella ?The music in the film is so beautiful．

一Really ?When it?

A．will you watch B．did you watch

C．have you watched D．do you watch

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It happens every spring. Flowers come out everywhere on the same day. But how do plants “know” when to flower?

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Although researchers have only studied how the FKF1 protein works in the Arabidopsis, they believe that it is the same with many other plants, including crops such as rice and wheat. This could be useful to the agricultural industry.

“If we can control when flowers come out, we might be able to increase crop production,” Imaizumi said.

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B. what people can do with plants

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