题目内容

【C4】

A. may
B. must
C. even
D. also

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A. it
B. they
C. which
D. she

A. happy
B. young
C. busy
D. helpful

A. offices
B. machines
C. rooms
D. lessons

A. Labor and education.
B. Products and services.
C. Transaction and insurance.
D. Utilities and repairs.