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Sea otters（海獺）off the coast of California have an unusual method of getting food. They dive to the floor of the sea to find the shellfish（貝）they like，no matter how deep the sea is．

When an otter brings a shellfish to the surface of the sea water，he floats on his back and put the shellfish on his chest．Then the otter manages to dig the meat out of the shell with his sharp teeth．

Sea otters are especially fond of shellfish with a very hard shell．When the otter brings one of these，he also brings a stone．He puts the stone on his chest，holding the shellfish in his paws（爪）．He gives a good beat and breaks the hard shell on the stone．Then he has no trouble getting the meat in the hard shell．

1．From the passage we can see that these otters live _____________.

A．in the sea off the coast of California 

B．on the land near the coast of California

C．on the floor of the sea

D．on the surface of the sea water

2．To catch shellfish, otters must _____________．

A．float on his back   

B．dive to the floor of the sea where they can find them

C．come to the surface of the sea

D．dive to tile floor of the sea where it is very deep

3．The otters use stones to_____________．

A．dig the meat from the inside of the shell

B．dig the shellfish from the sea floor

C．break the hard shelIs so that they can eat the meat

D．break the meat so that they can eat it easily

4．Arrange the correct order about how a sea otter gets food from the inside of a shellfish．

a．It tries to get a shellfish．

b．It manages to break the shell on the stone．

c．It floats on his back putting the stone on his chest．

d．It gets a stone．

e．It digs the meat out of the shell with his teeth．

A．e，a，c，b，d                                       B．c，a，d，e，b   

C．b，a，e．e，d                                          D．a，d，c，b，e