【正确答案】 A

【答案解析】[解析] 画线词astonished为形容词，意为“吃惊的”，C项amazed意为“惊讶的”，与画线词意思相近；例：I was amazed at her ability to cope with the difficult situation.她应对困境的能力使我惊讶。A项amused意为“被逗乐的”；例：The audience was amused by the performance.观众被这个表演逗乐了。B项的原形amount意为“总计”；例：My income for that year amounted to 1,000 dollars.我那一年的收入达到1000美元。D项的原形approach意为“靠近”；例：As the winter approached, the weather became colder.冬天渐近，天气变得冷了些。