Completion

1)Metric
2)Five
3)Meter
4)
5)Weight

The International System of Units (SI) is a revision of the ___1____ system. There are __2____ SI base units. In SI, the base unit of length is the ___3____. The Space taken up by a cube that is 10cm on each edge is one __4___. A measure of the pull of gravity on an object of given mass is its __5___.

You need not post duplicates. This is answered at the original post.

there are seven base units not five

The completion of the sentence:

The International System of Units (SI) is a revision of the metric system. There are five SI base units. In SI, the base unit of length is the meter. The space taken up by a cube that is 10cm on each edge is one liter. A measure of the pull of gravity on an object of given mass is its weight.