问题
选择题
____ the chapter four times, I finally understood the author's theory.[ ]
A. Reading
B. Having read
C. To read
D. Read
答案
答案：B
搜题请搜索小程序“爱下问搜题”
____ the chapter four times, I finally understood the author's theory.[ ]
A. Reading
B. Having read
C. To read
D. Read
答案：B