问题
选择题
13．Not until I was a senior student_________the importance of English.
A．I have realized
B．did I realize
C．have I realized
D．I realized
答案
答案：B
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13．Not until I was a senior student_________the importance of English.
A．I have realized
B．did I realize
C．have I realized
D．I realized
答案：B