Only when humans use nonchemical approaches to pest control______ 
A.Will creatures such as roaches and rodents be successfully eliminated .
B.Creatures such as roaches and rodents will be successfully eliminated . 
C.If creatures such as roaches and rodents will be successfully eliminated .
D.That creatures such as roaches and rodents will be successfully eliminated.

Mr. Nixon refused to answer the questions on the _____ that the matter was confidential . 
A.reasons 
B.excuses
C.grounds
D. foundations.

 – Janet : “did you sleep well ?” – Peter : “yeah , like a ______” 
A.horse
B.fish
C.drunk 
D.log

What is the passage above mainly about ? 
A.Natural resource shortages 
B.Agricultural irrigation
C.The headwaters of a major river 
D.Conservation conflicts

Which word in the reading means “living or growing in , happening in , or connected with water ” ? 
A.major
B.necessary 
C. fresh
D.aquatic

What does “methods ” in line 5 mean ? 
A.plans 
B.orders
C.structure
D.ways

What does “supply” in line 3 mean ? 
A.cover 
B.provide
C.make up for
D.compensate for

 When do conflicts decline ? 
A.When eroded soil and silt cloud affect many organisms. 
B.When natural resource shortages increase in the features of gradually increasing demands from human population.
C.When freedom could destroy the resource.
D.When a natural resource crosses political organisms

Which sentence below is NOT correct ? 
A.Farmers , fishers and industry leaders vie for open access to this river. 
B.Conservation methods are incidental to care for the river for future use .
C.A river may provide water for agricultural irrigation, habitat for fish , and water-generated electricity for a factory 
D.Argument often surrounds how a resource should be used , or allocated , and for whom.

What does “arise” in line 1 mean ? 
A.Get up
B.sit up
C.stand up
D.spring up