ExercisesContentsDownloadsUPPER · UNIT 2: BE VERBSQuestion 1 / 15请完成全部题目,最后查看答案与解析GRAMMAR · A1 · TYPE YOUR ANSWERExercise 1 · am, is or areComplete each sentence with am, is or are.I _____ ready.输入单词、短语或完整答案;多空答案用 / 分隔保存并进入下一题 →