The students _________ their classroom when the visitors arrived.A . have cleaned B. had cleaned C. was cleaning D. have been cleaned
举一反三
- The students have cleaned the classroom, _______?
- Thestudents______theclassroomnow. A: cleaned B: arecleaning C: have been cleaning D: clean
- The students have cleaned the classroom, ____ ? A: do they B: don’t they C: have they D: haven’t they
- Our boss is taking everyone to the ballet tonight, and I need to make sure my new dress ______ for the occasion. A: has been cleaned B: should have been cleaned C: is being cleaned D: has been cleaning
- you already your room? -Yes.I it two hours ago A: Did, clean; cleaned B: Did, clean, have cleaned C: Have, cleaned; cleaned Have, cleaned; have cleaned