He wrote a long letter ______ he explained what had happened in the accident．
| A．what | B．which |
| C．where | D．how |
The manager thought________difficult to finish the task in such a short time.
| A．that | B．it |
| C．this | D．him |
We are so ________ at the news that so many people were ________ and killed in the earthquake.
| A．shocked；injured | B．concerned；lost |
| C．surprised；harmed | D．trapped；hurt |
At last，the judge condemned the criminal________ten years in jail.
| A．for | B．at |
| C．to | D．in |
Reportedly yesterday a group of American soldiers were walking along the road in Iraq when a bomb was ________，three of whom were killed.
| A．set about | B．set off |
| C．set free | D．set out |
Mr.Smith wished to forget everything________with his former life.
| A．associates | B．associated |
| C．associating | D．to associate |