"The birds are flying over the ocean."
Translation:Les oiseaux volent au-dessus de l'océan.
Yes, "survolent" is very good, not because it is modern (it is not), but because it is more elegant. I added it. Thanks.
I selected "l'" for l'ocean, but was told that I had not put it in. This happened twice.
Because océan begins with a vowel so, for the sake of elision, du becomes de l'.
I thought nouns that started with vowels used l' instead of le or les? Why is't it l'oiseaux?
Oiseaux is plural. I don't think you can use l' with plurals, only the singular.
Nouns that start with vowels use "l'" instead of "le" or "la". Their plurals still use "les".
For the third time I selected l' in front of ocean, but duo lingo said I had not done so. It seems I cannot complete this lesson.