— How clean the classroom is! — Yes, I am sure someone it.
---What did you discuss just now? ---We discussed .
---It looks heavy. Can I give you a hand? ---___________.
--Haven't you seen Mr. Wilson at the lecture? --Yes, but he had left _________ I could ask him any questions.
---Excuse me,I want to buy some milk.Where can I find a supermarket? ---Oh,I know ________ not far from my home.
--- ___________? --- That would be great! Please drop me off at the library.