Yes it’s good, though it’d be better if you used “Your sister and my sister are best friends, they do many things together” that (and) word doesn’t seem necessary. Hope this helped :)
Injurious is defined as causing physical harm. With this in mind, the best piece of evidence to support this is 4.
The answer is self-monitoring. Hope this helps! :)
There is no passage and answer choices, so it is impossible to answer this question. I apologise.
I think a biographical dictionary.