The entire hall burst into a great cheer and applause ______ the Nobel Prize winner appeared on the stage accompanied by the chairman.
| A．until | B．while | C．by the time | D．the moment |
Professor Li’s health was completely___________ by ten years of hard work.
| A．hurt | B．injured | C．ruined | D．damaged |
I haven’t seen Sara since she was a little girl, and she has changed beyond ___________.
| A．hearing | B．recognition | C．strength | D．measure |
According to the embarrassing situation here, I’m afraid that your arrival at present is not quiet ________.
| A．in practice | B．in demand | C．in place | D．in turn |
We could hardly believe what she says because she is ________ changing her mind.
| A．regularly | B．constantly | C．eventually | D．steadily |
Unemployment arises partly from overpopulation and if fines can’t keep the rich from having more than one child, we should say that the regulation is not ________.
| A．efficient | B．evident | C．economic | D．effective |