These product are very cheap because the industry___the raw materials,the prices of which remain low
| A．takes on |
| B．depends on |
| C．stands on |
| D．keeps on |
Electrolysis(电解)is the process ______ electric current is passed through a substance to cause a chemical charge.
| A．which | B．whose | C．to which | D．by which |
So much ______ by the poem for the Wenchuan earthquake that he decided to participate in the re-construction of the damaged region.
| A．did he move | B．he moved | C．was he moved | D．he was moved |
Scientists ______ SARS for several months before a major discovery was made in the field.
| A．had been studying | B．have been studying |
| C．have studied | D．are studying |
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.
| A．having sold | B．to be sold | C．selling | D．sells |
If money is ______ one wants most in his life, he is very likely to be unhappy.
| A．that | B．what | C．why | D．how |