问题
选择题
93. The diligent student refused the help of others and insisted on working out the difficult maths problem _____.
A．on his own
B．in his own
C．of his own
D．for his own
答案
答案：A
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93. The diligent student refused the help of others and insisted on working out the difficult maths problem _____.
A．on his own
B．in his own
C．of his own
D．for his own
答案：A