---Lin Too, open _______door, please. ---I’ m coming, Mum.
----- I don’t think waste water should be put into the rivers or lakes.----_____.It will cause much water pollution.
--- Oh, Jack’s not here these days. Is he ill?---________. His mother told me that he was in hospital.
-- How about going shopping on Renmin Road this evening?--- ______,but I have to prepare for tomorrow’s exam.
----Your monitor is never late for school, is he?--- ______.He always comes to school earlier than others.
---Are Mr. and Mrs. Wang living alone in the house? ---Yes, they have three sons, but ______ of them live in their own houses.