a piece of cake|be a piece of cake

期末考试是小菜一碟。

The final test was ___a ___piece ___of ___cake.

写那份报告结果非常轻松。

Writing that report turned out to be ___a ___piece ___of ___cake.

有了清晰的说明书，组装新家具易如反掌。

Assembling the new furniture was ___a ___piece ___of ___cake with the clear instructions.

别担心修水槽的事；只要有合适的工具，这会很容易。

Don't worry about fixing the sink; with the right tools, it'll ___be ___a ___piece ___of ___cake.