Wolves will _________ their lives _________ the loss of the trees and forests.
| A．lose; because | B．lose; because of | C．lost; because | D．lost; because of |
Scientists from different countries are trying to_______ a good way to solve the energy problem.
| A．keep up with | B．come up with | C．catch up with | D．meet up with |
Detective Lu thought that ________ Xie Yiming ________ Wang Gang were likely to kidnap Guan Fei, Guan Dawei’s son.
| A．either, or | B．both, and | C．neither, nor | D．not only, but also. |
With a record of more than 90 goals in 2012, Messi is considered as the_______ football player in the world.
| A．successfully | B．successful | C．most successfully | D．most successful |
----Where is Tom now, Millie?
----I saw him _______ in the street a moment ago and I told him _________.
| A．playing; don’t do so | B．playing; not to do so |
| C．play; to do so | D．play; don’t do so |
______ time goes by, China is getting stronger and stronger.
| A．Until | B．While | C．As | D．When |