The US dropped an atom bob. No other country had done that before. The US was the first country ______________________Đoạn văn105/114IX. Complete the second sentence, using an infinitive relative clause.The US dropped an atom bob. No other country had done that before.The US was the first country ______________________Nhập câu trả lời ở đâyXác nhậnGiải thíchThe US was the first country to drop an atom bomb.