When it comes to giving his kids the education they deserve, the 51-year-old father knows he never _______ college without financial aid.
| A．could have attended | B．could attend |
| C．had attended | D．should have attended |
Every year _____ money and energy is spent on environment protection.
| A．large quantities of | B．a large number of | C．a large quantity of | D．a plenty of |
Nobody knows for sure what effect the global warming have _____ our environment in the long term.
| A．of | B．with | C．for | D．on |
Seeing the world-famous pianist standing in front of her, the young pianist ______ a cry of joy and surprise.
| A．left out | B．let out | C．came out | D．spoke out |
The thief trapped in the house _____ from the window but the fear of falling to his death scared him not to do so.
| A．managed to escape | B．tried to run |
| C．attempted to escape | D．tried escaping |
________ computer games, his parents were very worried about his study.
| A．Addicted to | B．He addicted to |
| C．His addicting to | D．Addicting to |