A.When the ecological balance of the river is lost.
B.When people consume more fish than they used to.
C.When large numbers of algae, fish and birds are killed.
D.When the production of marine petroleum is increased.
A.When the ecological balance of the river is lost.
B.When people consume more fish than they used to.
C.When large numbers of algae, fish and birds are killed.
D.When the production of marine petroleum is increased.
Men differ from animals ______ they can think and speak.[2008]
A.or which
B.for that
C.in that
D.in which
Lions can be photographed easily when ______.
A.they are following a trail of something that smells good to them
B.they are returning to their families
C.they have been trained to work with other animals
D.they do not know a movie actor is nearby
Dolphins are evolved from______.
A.fish-eating mammals
B.sea animals
C.grass-eating fish
D.land animals
A.A comparison of fish as a cold-blooded animal with warm-blooded animals.
B.The difference between water animals and land animals.
C.The importance of fish to human beings.
D.How water has affected the development of fish.
A.seafood
B.entree
C.table d’hôte
D.appetizer
A.different in that
B.different so that
C.differ in that
D.differ so that
A.and
B.together with
C.even
D.but not
A.fish-eating mammals
B.sea animals
C.grass-eating fish
D.landanimal
A.Meat, fish and fruits.
B.Different insects, wild fruits and roots.
C.Seal, boar, whale meat and fish.
D.Different animals and vegetables.
A.Horse
B.Elephant
C.Seabird
D.Fish
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