____you had worked hard, you would have easily passed the final test.
| A．When | B．If | C．Thought | D．Since |
It’s very dangerous to be ____ to the SARS virus without any protection.
| A．disclosed | B．uncover | C．affected | D．exposed |
Officials believe that more than one person _____ for the big fire.
| A．is to be blamed | B．should blame |
| C．should be blaming | D．is to blame |
Father ____ , I turned on the computer.
| A．agreed | B．agreeing | C．agrees | D．to agree |
I would appreciate ____ if you can keep an eye on my dog while I am away.
| A．you | B．that | C．不填 | D．it |
The old temple damaged in the earthquake ____ the Qing Dynasty.
| A．is dated back to | B．dates from | C．dated back to | D．was dating from |