摘要： Once harm to the environment, it takes years to have the system recovered. A. does B. is done C. will be done D. be done
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Once harm ______ to the environment, it takes years to have the system recovered.
A. does B. is done C. will be done D. be done
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Once harm ______ to the environment, it takes years to have the system recovered.
A. does B. is done C. will be done D. be done
查看习题详情和答案>>
Once harm ______ to the environment, it takes years to have the system recovered.
A. does B. is done C. will be done D. be done
查看习题详情和答案>>