_______ the fact that three quarters of the earth’s surface is covered with water, we can say that it is a ________ planet.
| A.Given; water-covering | B.having been given; water-covered | 
| C.Considering; water-covered | D.To consider; water-to-cover | 
He held a senior in a large company.
| A.situation | 
| B.position | 
| C.condition | 
| D.attention | 
Tell your sister the good news .
| A.as soon as you possible | 
| B.as soon as you can | 
| C.as possible as you can | 
| D.as soon as can | 
The street ______ the traffic accident last night,
| A.sensed | 
| B.saw | 
| C.knew | 
| D.had seen | 
The professor was invited here to advise usEnglish study.
| A.onto | 
| B.of | 
| C.at | 
| D.on | 
I failed in the final examination last term and only then _____ the importance of study.
| A.I realized | 
| B.had I realized | 
| C.I had realized | 
| D.did I realized |