通过驾驶考试对我的信心是个巨大的鼓舞。

Passing my driving test was such a ___boost to my confidence.

降低利率将给经济带来急需的提振。

The lowering of interest rates will give a much-needed ___boost to the economy.

它真的给了我们一个鼓舞！

It really gave us a ___boost!