Taxi is one of the most common means of city transport, so the increase of taxi _______ in Hangzhou has led to much public concern.
The noise of the traffic and people __________,as if someone had turned down the volume of the world.
With no more wood added to the fire, it finally died __________.
Wolves are very __________:they can live in forests, on open plains, or in the snows of the Arctic.
Such animals like dinosaurs died out because they couldn't __________ to the change of the climate.
Little Tom easily __________ himself to the American life as he moved to the USA with his parents when he was only three.