单选题With the rapid growth&nbs

问题补充：

单选题WiththerapidgrowthofCyberspace,everyoneshouldbeencouragedtouse______Internetas______tool,makingitatrendtostudyinvirtualschoolsinthefuture.A.不填；aB.不填; theC.the; theD.the; a

答案：

C