School administrators point out that the texts may be free online, but students need a way to access them. Not everyone has a computer or electronic reader. Schools could print out copies, but that would not help the environment. Also, there is the cost to train teachers to use digital textbooks effectively.

　　37.The Digital Textbook Initiative .

　　A.will probably take effect in six years B.covers all the high school subjects

　　C.has been approved by all states

　　D.is advocated by California state governor

　　38.The main reason for promoting digital textbooks is to .

　　A.help save money

　　B.benefit the environment

　　C.provide interesting materials

　　D.reduce students’ heavy burden

　　39.The digital textbooks were approved by .

　　A.trained teachers B.content developers

　　C.Khosla Family D.CK12 Foundation

　　40.What is true of CK12 Foundation?

　　A.It produced 16 digital textbooks.

　　B.It paid teachers to write digital textbooks.

　　C.It is financed by California state government.

　　D.It makes money through developing digital textbooks.

　　41.According to Susan Martimo, digital textbooks .

　　A.are not likely to have a widespread use B.will soon replace traditional ones

　　C.will first be adopted by well-equipped schools D.are certain to be approved by school districts

　　42.It can be inferred from the last paragraph that .

　　A.schools are reluctant to print out copies

　　B.the use of digital textbooks is not really free C.students need to pay for computers

　　D.training teachers to use the textbooks is not efficient

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