ExercisesContentsDownloadsUNIT 1: QUESTIONS: DIFFERENT TYPESQuestion 1 / 20请完成全部题目,最后查看答案与解析GRAMMAR · B1+ Exercise 1 · Exercise 1Choose the best answer.Tom has gone somewhere, but I don’t know where ___ .Ahe's goneBis he goneChas he gone保存并进入下一题 →