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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E. Complete the sentences using Present Perfect Continuous. 20.It … for two days. (rain) 21 .John …...
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