You're obviously not going to need this exact sentence. However, don't think of Duolingo as a phrasebook. While Duolingo does contain many good phrases - and it would do well to contain many more - it's mainly about teaching vocabulary and sentence construction.
Here, you're practising:
- the word for "elephant"
- the word for "tomato"
- the singular definite (twice)
- the en-word gender (twice)
- the present tense of having
- the basic SVO word order
These are building blocks you'll need a lot as you speak the language, and in some cases, learning them by absurdity may actually increase the chances that they stick. Don't dismiss them because you're unlikely to ever use them in combination. :)