单项选择题

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A.There are too many underdeveloped countries in the world.
B.Underdeveloped countries have low level of industrial development.
C.Different governments have different views on the question.
D.Even developed countries have complex problems.
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单项选择题
A.How grasshoppers find food.B.How grasshoppers fight other insects.C.How grasshoppers communicate with each other.D.How grasshoppers escape from danger.
A.How grasshoppers find food.
B.How grasshoppers fight other insects.
C.How grasshoppers communicate with each other.
D.How grasshoppers escape from danger.
单项选择题
A.Full of violence.B.Involving no intellectually stimulation.C.Noisy but non-interactive.D.Quiet and non-interactive.
A.Full of violence.
B.Involving no intellectually stimulation.
C.Noisy but non-interactive.
D.Quiet and non-interactive.
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