2 goes with the second one (control rods).
3 goes with forth one (mass of unstable fuel)
4 goes with one (shield)
1 goes with third one (moderator)
5 goes with coolant
Increase their vocabulary and comprehension
Oops, you forgot the little passage but I have this packet too! :)
A. She was a public leader of a reform movement.
Dix was a leader of reforms for the treatment of the mentally ill. In the passage, she is mentioned as an expectation because she take a leadership role in her reform movement.
Circle turned the men into pigs