Question

【题目】________ (fight) the virus, China has devoted great efforts to vaccine research and development(疫苗研发).

Answer 1

【答案】To fight

【解析】

句意：为了抗击这种病毒，中国致力于疫苗的研发。

根据“China has devoted great efforts to vaccine research and development.”可知中国致力于疫苗的研发，应该是为了抗击病毒，需用动词不定式表示目的，所以填to fight，因在句首，首字母要大写。故填To fight。