1) I...... Machu Picchu yet. a) hasn't visited b) haven't visited 2) Archaeologists still...... why people ... a) not have guess b) haven't guessed 3) people ..... in ancient city a) have lived b) has living 4) The Jerach festival ...... every year. a) has happened b) have been 5) Arcaeologists have..........that Gobekli Tepe.. a) discover b) discovered

Leaderboard

Visual style

Options

Switch template

Continue editing: ?