题目内容

production

A. many
B. concerned with the environment
C. the making of

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A. to try out
B. the use of resources so as not to cause permanent damage
C. the main location (of a company)

A. a group
B. to examine
C. payments

A. to give permission to use
B. concerned with the environment
C. all the members of a family of about same age

A. a group
B. to examine
C. payments