问题
选择题
I'll never forget the days ____ I learned hard in my senior high school, ____ changed my whole life.[ ]
A. that; which
B. when; which
C. which; when
D. that; that
答案
答案：B
搜题请搜索小程序“爱下问搜题”
I'll never forget the days ____ I learned hard in my senior high school, ____ changed my whole life.[ ]
A. that; which
B. when; which
C. which; when
D. that; that
答案：B
”表示氢原子，“
”表示氧原子，则