Operation Migration works with several other organizations and government institutes. Together, they assist hundreds of cranes each year. However, some experts predict that soon,this wont be necessary. Thanks to Operation Migration and its partners, the crane population will continue to migrate. Hopefully, they wont need human help any more.

Whooping cranes migrate in winter to______

A．find warmth and food.

B．raise baby whooping cranes.

C．get human help.

D．lay eggs.

32、Whooping cranes are native to_____

A．Mexico.

B．South America.

C．North America.

D．The Persian Gulf.

33、Operation Migration aims to______

A．teach adult cranes how to fly.

B．lead young cranes on their first trip south.

C．breed cranes in special parks.

D．transport cranes to the North.

34、The distance covered by the young whooping cranes on their trips south is_____

A．120 miles.

B．1,200 miles.

C．1,931 miles.

D．2, 000 miles.

35、If Operation Migration is successful, whooping cranes will______

A．follow airplanes south every year.

B．live in Canada all year round.

C．learn to migrate on their own.

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