单选题 Comrade Li promised to help us and he said he would come ______.
  • A. right away
  • B. all at once
  • C. all of a sudden
  • D. all right
【正确答案】 A
【答案解析】[解析] 本题考察几个常见易混词组的区别。fight away，立刻、马上；all at once，同时、突然；all of a sudden，突然、冷不防；all right，好的。