【正确答案】 C

【答案解析】[解析] 画线词原形astonish为动词，意为“使吃惊”。C项amaze意为“使惊讶”，与画线词意思相近；例：Her ability to cope with the difficult situation amazed me.她应对困境的能力使我惊讶。A项amuse意为“逗乐”；例：The performance amused the audience.观众被这个表演逗乐了。B项amounted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approached意为“靠近”；例：As the winter approached, the weather became colder.冬天渐近，天气变得冷了些。