单项选择题
A．watching many kinds of animals B．studying dinosaurs’ living relatives C．following the tracks left behind D．working on dug-out dinosaur eggs
A．was paid $ 35,000 B．learned to paint C．had already buried the treasure D．did not know what the story would be about
A．the high buildings B．the high price of land C．the far spreading, of the city D．the heavy traffic