Improve the grammaticality of this sentence: However, social policy has to be revised timely to address the changing needs of the elderly.
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The second sentence is a bit more complex.
The third sentence is a bit more complex.
The third sentence is a bit more complex.
The third sentence is a bit more complex.
The third sentence is a bit more complex.
The third sentence is a bit more complex.
The third sentence is a bit more complex.
The third sentence is a bit more complex.
The
The first sentence is a bit more complex. The first sentence is a bit more complex.
The second sentence is a bit more complex.
The third sentence is a bit more complex.
The third sentence is a bit more complex.
The third sentence is a bit more complex.
The third sentence is a bit more complex.
The third sentence is a bit more complex.
The third sentence is a bit more complex.
The third sentence is a bit more complex.
The