题干
When I put the wet glass on the table, I found it left a ________on the surface of the table.
A：signal
B：sign
C：symbol
D：mark
答案(点此获取答案解析）
D
When I put the wet glass on the table, I found it left a ________on the surface of the table.
A：signal
B：sign
C：symbol
D：mark
