Choose the word (a, b, c, or d) that best fits each of the blank space

Choose the word (a, b, c, or d) that best fits each of the blank spaces. I can’t (Question 21) ____ it, we’re really here! The flight to Quito (the capital) (Question 22) _____ twenty-three hours. (Question 23) _____ we arrived, we were taken on a tour of Quito, (Question 24) _____ as a ‘hot dog’ by our guide because of its shape. After (Question 25) _______ the city from high up, we went down town (Question 26) _____ the richly-decorated churches. Question 21.