Answer: 1. -2 2.C 3。 A 4。 Slightly 5.3 6.4950 7. Suppose A eliminates X, B eliminates Y, x+y= 10, 2x+3y=26, ∴x=4, y=6 8. Typing is tiring. I only typed some multiple-choice questions, and I also typed some short-answer questions that were particularly difficult.