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60.

Why is compared to a fertilizer in Para. 3?

• A、They both absorb light.

• B、They both store heat.

• C、They both help plants grow.

• D、They both cause global warming

What does most research about cats show?

• A、They don't need their owners’ attention.

• B、They are emotionally attached to their owners.

• C、They don't experience separation anxiety as dogs do.

• D、They respond to their owners’ voices less than dogs do.