在长方形上画一条对角线连接左上角和右下角。

Draw a ___diagonal line from the top-left corner to the bottom-right corner of the rectangle.

他在纸上画了一条对角线。

He drew a ___diagonal line on the paper.

他在纸上画了一条斜线连接两个角。

He drew a ___diagonal line on the paper to connect the two corners.