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E. Complete the sentences using Present Perfect Continuous.
20.It … for two days. (rain)
21 .John … for two hours now! (sleep)
22.How long … you … the environment problems? (study)
23.She … to raise money for the zoo for months. (try)
24.He … hard to build a nesting box, that’s why it has already broken. (not / work)

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20. has been raining

21 has been sleeping

22/ 1. time 2.have been studing

23 has been trying

24 has not been working

Объяснение:


The internet - the phenomenon ambiguous. it is bad that has no borders! that is, it doesn't protect teenagers from substandard information which children absolutely have no need to know. along with useful information and positive communication, there are clubs of addicts, suicides, terrorists, the pornography sea that constitutes huge danger to teenagers at whom moral values aren't created yet, and thirst for "adult" entertainments of a bike. special danger to the child consists in possibility of his involvement through social networks in extremist groups, the destructive religious organizations, whose activity is directed on commission antisocial, illegal, including penal acts.

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