Only when _________________________.
| A．did he arrive the meeting began |
| B．he arrived the meeting began. |
| C．did he arrive did the meeting begin. |
| D．he arrived did the meeting begin. |
Would you please _________ my good wishes to your parents?
| A．convey | B．tell | C．explain | D．translate |
Einstein liked Bose’s paper so much that he ________ his own work and translated it into German.
| A．gave off | B．turned down | C．took over | D．set aside |
Giving up my job to go back to full-time education was a big __________, but now I know it was the best decision I ever made.
| A．project | B．commitment | C．competition | D．ambition |
The new tax would force companies to __________energy-saving measures.
| A．adapt | B．adopt | C．adjust | D．address |
But for water，it ______ possible to live in the desert．
| A．is | B．was | C．were | D．wouldn't be |