WHICH and WHAT

You'll already have grasped from WHICH 05 that English tends to use 'what' instead of 'which', for something fairly non-specific, or not-previously-specified.

French tends to use 'which', or 'that which', a little more than English (now) does. You will need to learn to gauge what fits where.

What time is it?	Quelle heure est-il?
Which of the loaves of bread do you prefer?	Lequel des pains préférez-vous?
Which of the televisions do you prefer?	Laquelle des télévisions préférez-vous?
Which books are interesting?	Quels livres sont intéressants?

Note that 'quel', 'quelle', 'quels', 'quelles' for 'which' or 'what' need to *agree* with the noun. A fairly good guideline for choosing one of the 'quel' family (instead of a 'lequel' variable) is where you could say 'what' as opposed to 'which', in English - but only if referring to something *specific*.

What a pity!

Quel dommage!

What a surprise!

Quelle surprise!

The last one below doesn't refer to anything specific - so we're back to the non-specific 'ce que' that you met in WHICH 05.

Tell me which television you would like.	Dites-moi quelle télévision vous voudriez.
Tell me which one (of the televisions) you would like.	Dites-moi laquelle vous voudriez.
Tell me what (ie that which) you would like.	Dites-moi ce que vous voudriez.