我已经尝试过几十种方法来解决这个问题。

I've tried ___dozens of ways to solve this problem.

商店里有几十种不同口味的冰淇淋可供选择。

The store offers ___dozens of different ice cream flavors to choose from.

面包店每天要准备几十个甜甜圈。

The bakery prepares ___dozens of donuts every day.