Airisnecessaryforpeople;itisnecessaryforplants

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问题详情:

 Airisnecessaryforpeople;itisnecessaryforplants

 Air is necessary for people; it is necessary for plants ___.

A. either           B. though            C. as well       D. also

【回答】

C

知识点:词组 短语

题型:选择题

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