1. It is impossible to keep your eyes open when you ____ 2. If a lizard loses its tail, it ____ another one. 3. When you get older, your brain ____ smaller. 4. If a peacock ____ brown feathers, it is a female. 5. When pigs are happy, they ____ their tail. 6. If you ____ orange and red, you get purple. 7. If you ____ less, you feel hungrier.

Zero conditional quiz 2

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