那份作业真是小菜一碟。

That assignment was ___a ___piece ___of ___cake.

通过那门考试易如反掌。

Passing that test was ___a ___piece ___of ___cake.

对于水管工来说，修好这个漏水的水龙头应该不费吹灰之力。

Fixing this leaky faucet should be ___a ___piece ___of ___cake for a plumber.