【正文】
e PPT) Have you done your homework ______? (for, just, yet) I have _______ __been to Chengdu. (ever, never, yet) He has _______ washed the dishes. (already, ever, for) Read ,write and remember. He has worked there _______ he left school. (already, just, since) Have you cleaned your room _______? (for, just, yet) She has kno