Answer:
This is your answer.
Explanation:
The best revision of the sentence is may keep things safe for students, which makes it necessary.
Answer:
1 the children have just returned....
2 I have never...
3 we already had...
4
5 I have seen the .... parade only once in my life
I would assess this info in the context of the work expected from them. Are they building websites for you? While the site appearance does reflect somewhat on their image, it may have little or nothing to do with their value otherwise.