If its speaking, record yourself asking and answering the questions. Then listen to the recording saying your answers at the same time. Basically you get used to what response comes with which question. (this worked for me)
Listening, listen to videos in arabic/French and see what words you recognise. Write them down and see if you can work out what they're saying.
Reading, basically just read articles and/or books... Things in arabic/French. Again work out of you can translate some of the sentences.
Writing, just do as it says. Write sentences relating to the content you know.
Learning your vocabulary is one of the most important aspects of your languages.
I know my school used to set us weekly vocab tests where we had a list of 20 or so words we had to learn the translations of.
This was a huge benefit for me.
If you don't do this in school, do it yourself at home.
Set yourself a list of useful vocab, and then like back in primary, read them, cover them, say them, write them, then check.
And a day or so later test yourself - how many can you remember?