Write a new sentence as similar as possible in meaning to the original sentence or do as directed

VI. Write a new sentence as similar as possible in meaning to the original sentence or do as directed.
1. Learning English is difficult for old people. A It
2  I spent three years at high school and then I went to university. A After I
3  Tom is so tired now. If he weren't so tired, he (Complete the sentence.)
4  All the guests enjoyed themselves at the party apart from George. A George was (Use "who" to rewrite.)