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20 Mar 08:37 AM

Question about English (US)

I saw this sentence on my textbook: “Our comprehensive national strength has greatly improved”, I wonder why it’s not “been improved”? I think we should use passive voice here, or maybe I am wrong. Anyone could explain it for me thanks!

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  • English (US)

  • Simplified Chinese (China)

  • English (US)

  • Simplified Chinese (China)

  • Simplified Chinese (China)

  • English (US)
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