-- Did you read a book about customs last week?-- Yes, I found ______ very useful to know the customs of foreign countries.

 -- Did you read a book about customs last week?-- Yes, I found ______ very useful to know the customs of foreign countries.

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that

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I don’t think         possible for us to learn a foreign language well without hard work.

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—Where is Beijing?—        here.

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.Mum,  ________my teacher, Mr Wang.

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