题目内容

There is evidence of major and geological changes during this period.

A. electric
B. emotional
C. economical
D. ecological

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of these “greenhouse” gases contributes to global warming.

A. Emotion
B. Emission
C. Elimination
D. Transmission

The creation of an efficient and transport system is critical.

A. sustainable
B. changeable
C. adaptable
D. usable

We need to an open exchange of ideas and information.

A. project
B. promote
C. propel
D. . provoke

The district is under consideration for designation as a area.

A. consolidation
B. protection
C. conservation
D. isolation