lack|lacks|lacked|lacking

他只是有点缺乏自信。

He just ___lacks a little confidence.

我们这所房子缺的是储物空间。

What we ___lack in this house is space to store things.

由于疾病，我们缺少三名员工。

We are ___lacking three members of staff due to illness.

该项目缺乏适当的资金，导致了它的失败。

The project ___lacked proper funding, which caused its failure.