In my opinion，life in the twenty－first century is much easier than ________.

A．that used to be

B．it is used to

C．it was used to

D．it used to be

预设图案不会显示在以下哪个工具的选项栏中？（）

A、油漆桶

B、图案图章

C、修复画笔和修补工具

D、摩术橡皮擦