我们从一开始就对这个产品的实用性持怀疑态度。

We were doubtful about the product's usefulness from the ___start.

他们宣布了一项新的商业冒险的开始。

They announced the ___start of a new commercial venture.

这是我假期的一个糟糕开始！

That was a bad ___start [to] my holidays!