现在完成时习题答案一、选词填空 A. 用 already 或 yet 1) Have they taken down the old pictures already? No, they havent yet. 2) Most of us have finished our compositions already. 3) He said he hadnt visited the exhibition yet. B. 用 since 或 for 1) We have learned five lessons since the beginning of this term. 2) Mrs. Liao has been in hospital since last week. 3) I have stayed at my aunts for two weeks. 一、选词填空 C. 用havegone 或havebeen 1)-Wherearetheboystudents? -Theyhavegonetotheschoolfactory. 2)-Isyourfatherin? -No,h
