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
砚），做笔用的狼毫，研墨用的墨条以及宣纸（即白纸）和做砚台用的砚石的主要成份依次是