--How is your cousin, Kate?
--She broke her leg and ______ medical treatment since.
| A．is receiving | B．has received |
| C．received | D．has been receiving |
The Apple Company had scarcely released i-Phone ______ it became one of the best-selling electronic products.
| A．than | B．before | C．while | D．when |
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 |