1) When I got to the college, I realized I....... the course book at home. a) had left b) had been leaving c) left 2) Jeff ..... Linda for two years when they got engaged. a) has known b) had been knowing c) had known 3) We...... twenty minutes for the bus when it finally arrived.  a) waited  b) had been waiting  c) were waiting 4) We didn´t want to leave because the party..... a) hadn´t been finishing b) didn´t finish c) hadn´t finished 5) We... for two hours when they finally let us in.  a) ´d been queuing b) were queuing c) ´ve been queuing  6) When I visited my home town after 10 years, it ...... a lot. a) changed b) had changed c) was changing 7) Alan was pleased because he......all his emails when it was time to finish.  a) ´d been answering b) ´d answered c) answered 8) When we got to the cinema, the movie ...... a) had already started b) started c) had been starting 9) I... in departures for 20 minutes when I realized my flight was already boarding.  a) have sat b) was sitting c) had been seating 10) Over the last ten years, we ....... in an ecological project to raise awareness.   a) have been working b) had been working c) worked

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