insoluble

(UK) [ɪnˈsɒljʊbl]
adjective ,

insolvable

(US) [ɪnˈsɒlvəbl]
adjective

1.	[which cannot be solved] unlösbar

2.	[which cannot be dissolved] unauflösbar

insoluble

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Complétez la séquence avec la proposition qui convient.

Je dis : My birthday is on ….
- 26, of February
- the twenty-sixth of February
- 26 in February