It was not until all the fish in the pond died that________ the situation was serious.
| A．did he realize | B．he realized |
| C．he had realized | D．had he realized |
The famous reporter, who is said to have gone back to America last year, _____in China for almost twenty years.
| A．lived | B．was living | C．has lived | D．had lived |
Although the necklace is just made of ordinary stones, it still ________ young people.
| A．appeals to | B．attracts to | C．submit to | D．applies for |
With my money ________, I went back home.
| A．ran out of | B．ran out | C．running out | D．running out of |
--- People should spare no efforts to protect the environment.
--- ________. Air pollution does harm to our health.
| A．All right | B．Take it easy | C．Go ahead | D．Exactly |
---Have you got everything ready for ___ concert?
---Yes, all is in ___ place．
| A．the; the | B．a; the | C．a; 不填 | D．the; 不填 |