On the table she found a piece of paper
题型：选择题
问题：
On the table she found a piece of paper _______ some confusing symbols.
A．which was written
B．that was written
C．on which were written
D．on that was written
On the table she found a piece of paper _______ some confusing symbols.
A．which was written
B．that was written
C．on which were written
D．on that was written