【单选题】Because of over-hunting, the number of certain types of whales has been reduced so greatly that they are in danger of becoming ________. A、 flourish B、 executive C、 security D、 extinct

【单选题】Because of over-hunting, the number of certain types of whales has been reduced so greatly that they are in danger of becoming ________.
A、
flourish

B、
executive

C、
security

D、
extinct

出自：河北农业大学大学英语Ⅳ

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