单选题 As soon as we crossed the border, enemy troops started firing at our troops.
  • A. shooting
  • B. fighting
  • C. striking
  • D. hitting


【正确答案】 A
【答案解析】[解析] 本句中的fire和shoot意思相同，发射(子弹)、开火；fight：打仗、打架；strike：敲、击、打击；hit：碰撞、击中。