金色星星在黑色背景下闪闪发光。

Gold stars shine brightly against a black ___background.

这位艺术家本人没有为自己的画作绘制背景——它们是由他的学生完成的。

The artist himself did not paint the ___backgrounds to his pictures - they were done by his pupils.

我认为这会让图片的背景色彩丰富且有趣。

I think it would make the ___background of the picture colourful and interesting.