The final examination is coming up soon. It’s time for us to _______ our studies.
The Apple Company had scarcely released i-Phone ______ it became one of the best-selling electronic products.
Electrolysis(电解)is the process ______ electric current is passed through a substance to cause a chemical charge.
So much ______ by the poem for the Wenchuan earthquake that he decided to participate in the re-construction of the damaged region.
Scientists ______ SARS for several months before a major discovery was made in the field.
Before the coming YSL auction, the Christie’s Auction(拍卖) Company had advertised all of the articles ______ including the Chinese heads of Rabbit and Rat.