On the international market, the price of petroleum has been falling down, which is now _____ it used to be.
Shortly after the accident, two___________ police were sent to the spot to keep order.
My dictionary__________. I have looked for it everywhere but still
—Who has taken my pen away? —__________. He was here a moment ago.
____________professional violinist practices for several hours a day, but____________ violinist has his own way of playing the Beethoven concert.
Mr. Zhang gaVeall textbooks to all the pupils, except___________ who had already taken tem.