Yes they have but in different terms. It depends how you are speaking about it. If you are saying in terms of how humans perceive achievement, or how humans process it then I could be of help. It terms of human perception, it is viewed as a thing to admire and envy. If were to put on a resume that you accomplished things differed for the better from the other resumes, that would be an achievement . That would be something the other applicants would admire and envy in the face of their failure to accomplish the things you did. In terms of human perception, it is a positive thing for yourself, but for others it could be there downfall. Refer to the example above.
'a' is based on prediction. It's a future situation.The test will be next week and the students hope it will be easy
Sumerians invented writing by drawing on soft pieces of clay because they needed some way to keep track of what they owned.