French language Q&A Forum

Wasn't sure which forum to ask this question as it relates to a different topic but this is the attached forum so I'll ask it here:

The statement and translation :

J’ai un cheveu blanc. – Non, tu as plusieurs cheveux blancs !

I have one white hair. – No, you have a few white hairs!

In this example the word ‘plusieurs’ was used to mean ‘a few’ but in the lesson “Quelques, plusieurs, de nombreux = A few, several, many (quantities), ‘plusieurs’ means several and quelques means ‘a few’. Is there a nuance in usage here?

I put in (for "I wear warm clothes") "Je porte des habits chauds,". It corrected me with "Je m'habille chaudement".  However, I saw in the possible answers there was "Je mets des habits chauds".  Is the object ("habits ou vêtements) dependent on the verb ("porter ou mettre)?

I was marked wrong for "Audrey adore les mercredis". It wanted "Audrey adore le mercredi". But it appears from the web that both are used, even if the singlar version is more popular.

"J'aime le mercredi" has 232,000 hits

"J'aime les mercredis" has 43,300 hits

So shouldn't this lesson cover the duality and shouldn't the quiz question accept both answers?

I never get this right. Please, is there a summary of when we would not write the "s" at the end of the tu form verb in l'imperatif ?

Thank you!