like: Tôi rất tiếc khi nghe tin Boris mất việc. → →
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I was sorry to hear that Boris lost his job. ☊ 
Tôi rất tiếc khi nghe tin Boris mất việc. ☊ I was sorry to hear that Boris lost his job. ☊ Tôi rất tiếc khi nghe tin Boris mất việc. ☊