Complete the journalist's notes about a very strange local scientist. Drag the correct words to complete the sentences.

The new machine, which is powered entirely by old coffee beans, makes a terrible sputtering noise. However, the assistant who helps him operate it doesn't seem to mind the smell. Honestly, it is the most ridiculous invention that I have ever seen!

The new machine, which is powered entirely by old coffee beans, makes a terrible sputtering noise.

We use which (not that) for non-defining relative clauses—the ones separated by commas that add extra, non-essential information about a thing.

However, the assistant who helps him operate it doesn't seem to mind the smell.

We use who as the subject pronoun for people.

Honestly, it is the most ridiculous invention that I have ever seen!

We use that for things in defining relative clauses. It is especially preferred after superlatives like "the most ridiculous."