一、单词拼写（须用第一单元的单词和词汇，共10小题，满分10分）
1. He was so a__________ in the book that he didn’t hear my call.
2. If a doctor or a medical treatment c_______ someone's illness， they make the people well again.
3. The farmers in this area had a good harvest last year thanks to the s_________ farming.
4. He b _______ me for my mistake.
