a lot of后加什么词

例句：

I am spending a lot of money and time on this boat, but it is worth it

我在这艘船上花了很多金钱和时间，但都很值得。

I have lost a lot of weight

我体重减了不少。

Is there a lot of effort and money going into this sort of research?

这种研究目前是否有大量的人力和资金投入？

I think a lot of people still underestimate him

我觉得很多人仍然低估了他。

You've caused us a lot of trouble

你给我们造成了很多麻烦。

A lot of this has to do with power and greed.

凡此种种都和权力与贪欲有关。