Read the excerpt from an argument in favor of having classes start later.As children get older, they go to bed later. _____, their classes begin earlier. _____, they are increasingly sleep deprived.

The first blank needs a contrast: although older children go to bed later, their classes begin earlier. “Yet” expresses that contrast. The second blank needs to show the result of this mismatch: they become increasingly sleep deprived, so “As a result” fits.

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