1) It.............since I got up. a) has rained b) has been raining 2) Have they ....... the experiment yet? a) finished b) been finishing 3) Have you ever........a tropical storm? a) seen b) been seeing 4) We........to find a solution to the problem for weeks. a) have tried b) have been trying 5) Good news! Sam.......a solution to the problem! a) has found b) has been finding 6) Sorry, I am late. How long have you.....? a) waited b) been waiting 7) Scientists ..... to find a solution to climate change for decades. a) have tried b) have been trying 8) It hasn't......for ages. a) snowed b) been snowing

present perfect, present perfect continuous

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