Passive to active: future perfect (will have been + past participle -> will have + past participle)

1. A.
   By 2040, the Indian population will have continued to grow uncontrollably
2. B.
   By 2040, the Indian government will have controlled the growing population of India.
3. C.
   By 2040, the Indian government is successfully controlling the growing population of India.
4. D.
   The Indian population will have stabilised by 2022.

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1. A.
   The courier will deliver the package before 5 PM.
2. B.
   The courier had delivered the package before 5 PM.
3. C.
   The courier has delivered the package before 5 PM.
4. D.
   The courier will have delivered the package before 5 PM.

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