Question

Answer 1

1. Most people prefer (spend)  money to (earn) earning it

2. I (meet) met  him twice this week but I (not speak) not spoken to him

3. He spends most of his free time (lie)  on the couch and (watch)  TV

4. I can't help (laugh) laughing when I see that clown

5. I'll remember (send) to send you a postcard when I reach London

Answer 2

21. spending - earning

22. met - didn't speak 

23. lieing- watching

25. to send