I regret not going to the airport to say goodbye to her.




A.I wish I have gone to the airport to say goodbye to her.
B.I wish I went to the airport to say goodbye to her.
C.If only I had gone to the airport to say goodbye to her.
D.If only I went to the airport to say goodbye to her.

_______(24)




A.crash
B.quick
C.rapid
D.fast

_______(19)




A.evaluation
B.chance
C.price
D.cost

Which area is considered one of the most industrialized?




A.Europe
B.South America
C.Middle East
D.Asia

Natural pollutants can play an important role in controlling air pollution for which of the following reasons?




A.They function as part of a purification process.
B.They occur in greater quantities than other pollutants.
C.They are less harmful to living beings than are other pollutants.
D.They have existed since the Earth developed.

According to the passage, the most important factor in the development of agriculture around Los Angeles was the ____________ .




A.influx of "new residents to agricultural areas near the city
B.construction of an aqueduct
C.expansion of transportation facilities
D.development of new connections to the city's natural harbor

Peter was out of town that Sunday. Therefore, he _____ the crime.




A.couldn't have committed
B.needn't have committed
C.must have committed
D.might have not committed

There's a world of difference between being a teacher and a student.




A.a great similarity
B.a yawning gap
C.on the contrary
D.a great divide

No matter __________, Mozart was an accomplished composer while still a child.




A.how it remarkable seems
B.how it seems remarkable
C.how seems it remarkable
D.how remarkable it seems

Following the accident, he was officially accused of _________ driving.




A.reckless
B.careful
C.hurry
D.responsible