My mother is very ill. She has to ________.

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--Let's go to the park together.

--Sounds ________.

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My mother works hard. She gets up ________ in my family.

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She is my younger sister. She can sing ________.

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I like ants best ________ they are busy every day.

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Which is ________ in China, cat or dog?

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Which is ________ animal, dog, snake or bird?

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--Do you like cats?

--Yes. I think ________ the cleverest animals.

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My favorite ________ dogs and cats.

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I want to buy this ruler. Because it is ________ of all the three.

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