这位作曲家最新的钢琴作品将在下个月的音乐会上首演。

The composer's latest piano ___compositions will premiere at next month's concert.

这幅画的构图非常平衡，各元素安排得当。

The ___composition of this painting is very balanced, with all elements well arranged.

音乐老师要求我们每周写一首新的钢琴曲作为作业。

Our music teacher assigns us to write new piano ___compositions every week as homework.

我们需要研究这种新型合金的化学成分。

We need to study the ___compositions of this new type of alloy.