Mark the letter A, B, C or D to indicate the word whose underlined part differs from the others

Here are the answers based on the instructions given:

1. **C. league** (The underlined part "leagu" differs from the others.)
2. **B. great** (The underlined part "grea" differs from the others.)
3. **C. forming** (The underlined part "form" differs from the others.)
4. **D. forum** (The underlined part "for" differs from the others.)
5. **D. famous** (The underlined part "famous" differs from the others.)

For the next section:

6. **B. however** (The correct answer is "however" for the given sentence.)
7. **A. forum** (The correct answer is "forum" for the given sentence.)
8. **B. but** (The correct answer is "but" for the given sentence.)

Let me know if you need further assistance!