Future tense "...after classes I'll check it and download them whole" Is it needed to put 'will' before 'download'?

Which one is correct? 'Be quiet! I've been trying / I'm trying to concentrate' please explain why...

Revise pls 'Laziness prevent us from developing' Is it ok to use 'prevent' in such sentence?

Regarding "question tags" Could you revise pls... 1.We are writing a test right now, aren't we? 2.We are writing a test right now, arent we? 3.I like to help my friends, do I? 4.Open the door, will you? 5.We have already decided where to go, haven't we? 6.I'm not a doctor, am i? 7.They don't like to go to the disco, are they? (or do they?)

Question forms of influence & affect How has it influenced you? Did it influence you? Did it affect you? Are these questions grammatically correct?

Which one is correct? Don't you want to walk with me today? Don't you want to take a walk with me today? Thx in advance!

is it correct? All videos are about host cities which have been selected. The rest - are difficult to download

Revise please or how to say it better 'In this case your internet traffic will be able to spend more' - is it correct?