(2012年潍坊市高三质量检测)A harmonious society is like a symphony or orchestra-each person contributes a small sound,but when________with other sounds,it becomes beautiful music.
He is always helping people without expecting anything _____.
If a shop has chairs _______ women can park their men, women will spend more time in the shop.
I bought a dress for only 20 dollars in a sale; it was really a good ______.
We can never expect________bluer sky unless we create________less polluted world.
The couple look very excited,because their only son has been _______to Hong Kong University.