题干
It was last year _____ I visited the museum _____ you had visited.
A：that; that
B：when, where
C：that; where
D：when; that
答案(点此获取答案解析）
A
A：that; that
B：when, where
C：that; where
D：when; that
个男孩的色盲基因是通过下列哪条途径传来的( )