This is( )clock.l's( )old clock.This is( )clock.l's( )old clock.

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This is( )clock.l's( )old clock.This is( )clock.l's( )old clock.

This is( )clock.l's( )old clock.This is( )clock.l's( )old clock.
This is( )clock.l's( )old clock.
This is( )clock.l's( )old clock.

This is( )clock.l's( )old clock.This is( )clock.l's( )old clock.
This is(a )clock.l's( an)old clock.

This is a clock. It's an old clock.

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