Good news! The price of all those second-hand goods is ________ before.
The professor could hardly find enough grounds on which to base his arguments ______ the new theory.
That is the only way we can imagine ______ the overuse of water in students’ bathrooms.
______ the breakfast room, there is also a cozy bar where guests can enjoy afternoon tea.
——May I go to play football with Mike now, Dad? ——No, you can’t go out ______ your homework is being done.
It is said that Chinese eat ______ vegetables per person today as they did about 30 years ago.