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Complete the gaps with the verbs using Present Simple, Present Continuous, Present Perfect or Present Perfect Continuous.

I 1. _________________ (to stay) with some American friends in Chicago. I 2. _________________ (to stay) with them for two weeks now. I 3. _________________ (to have) a great time here. I 4. _________________ (to take) the opportunity to improve my English. I 5. _________________ (to see) the towering skyscrapers of Chicago which are reflected in the rippling water of Lake Michigan. I 6. _________________ (to take) a picture of Chicago's Sears Tower which 7. _________________ (to rise) 1,707 feet and 8. _________________ ( to provide) a panoramic view from the skydeck.