单选题
Our on-going, ______ development seminars allow staff members to develop their skills in various directions.
A、
profession
B、
professionally
C、
professional
D、
professionalism
【正确答案】
C
【答案解析】
on-going后是逗号，说明横线处所填单词和on-going一起修饰development seminars，因此横线处应填入形容词。故选(C)professional。
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