Hoàn thành đoạn văn sau

I can't (1)........... it, we're really here! The flight to Quito ( the capital) (2)............. twenty-thre hours. (3).............we arrived, we were taken on a tour ò Quito, (4)............ as a 'hot dog' by our guide because of its shape. After(5)............ the city from high  up, we went down town (6) ........... the richly-decorated churches.

1.a.think                     b.believe                       c.know                     d.all are correct
2.a.took                      b.had                            c.got                         d.received
3.a.as soon as           b.as long as                  c.as far as                d.as near as         
4.a.describe               b.describes                   c.describing             d.views
5.a.view                     b.viewed                        c.viewing                 d.views
6.a.see                       b.seeing                        c.to see                   d.to seeing.