问题
选择题
Book Three of Vocational English_____ 12 units. [ ]
A. is made of
B. are made of
C. is made up of
D. are made up of
答案
答案：C
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Book Three of Vocational English_____ 12 units. [ ]
A. is made of
B. are made of
C. is made up of
D. are made up of
答案：C