WRITING: Rewrite the following sentences
Unless he phones immediately he won’t get any information.
If he …………………………………………………………………….
A.
B.
C.
D.

Chọn 01 trong 04 lựa chọn có phần gạch chân có cách phát âm khác với những lựa chọn còn lại.

A.book       
B.full         
C.cook          
D.pollute

Chọn 01 trong 04 lựa chọn có phần gạch chân có cách phát âm khác với những lựa chọn còn lại.

A.smooth
B.with        
C.this           
D.theatre

Which of the following is best supported by the passage?
A.To effectively control pollution, local government should regularly review their air pollution laws.
B.One of the most important steps in preserving natural lands is to better enforce air pollution laws.
C.Scientists should be consulted in order to establish uniform limits for all air pollutants.
D.Human activities have been effective in reducing air pollution.

The word “detectable” in the third paragraph is closest in meaning to _______. 
A.beneficial
B.special
C.measurable
D.separable

According to the passage, the numerical value of the concentration level of a substance is only useful if  ________. 
A.the other substances in the area are known
B.it is in a localized area
C.the natural level is also known
D.it can be calculated quickly

The word “localized” in the third paragraph is closest in meaning to ________ . 
A.specified
B.circled
C.surrounded
D.encircled

According to the passage, human-generated air pollution in localized regions  _____    .
A.can be dwarfed by nature’s output of pollutants
B.can overwhelm the natural system that removes pollutants 
C.will damage areas outside of the localized regions
D.will react harmfully with natural pollutants

For which of the following reasons can natural pollutants play an important role in controlling air pollution?
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 other pollutạnts.
D.They have existed since the Earth developed.

The word “These" in the second paragraph is closest in meaning to ______ . 
A.the various chemical reactions
B.the pollutants from the developing Earth 
C.the compounds moved to the water or soil 
D.the components in biogeochemical cycles