Rewrite the sentences using "wh-word + to-infinitive".
Viết lại câu sử dụng "wh-word + to V"
1. I don't know what I should do.
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2. Could you tell me where I can find more information about this?
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3. He's not sure when he should start the computer.
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4. They wondered how they could deal with this problem.
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