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You need to work _______, or you will make a lot of mistakes.

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Do you know _______ language is spoken in Kenya?

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- _______ do you play tennis?

- For exercise.

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These days, modern computers are often light in _______.

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I often eat sticky rice cake, but I don’t know _______ make it.

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The teacher asked me to speak _______.

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My brother is very good at natural _______ subjects such as Chemistry and Physics.

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Simply speaking, _______ is the tools and machines that help to solve problems.