单项选择题

A．It has been put off.
B．It has been cancelled.
C．It will be held in a different place.
D．It will be rescheduled to attract more participants.
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单项选择题
The main task now facing ecologists, environmental activists and conservationists is ________.
A．to prevent pollution by legislation, economic incentives and persuasion
B．to arouse public awareness of the importance of environmental protection
C．to take radical measures to control environmental pollution
D．to improve the quality of life by enforcing environmental standards
单项选择题
A．To clean the floor.B．To please the nurse.C．To see a patient.D．To surprise the story-teller.
A．To clean the floor.
B．To please the nurse.
C．To see a patient.
D．To surprise the story-teller.
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