Answer:
How much?
Explanation:
When it has diverse uses depending on how it has been used in a sense, it can be used when indicating time, asking a question, and many more other applications. However, in the given case, the word has been used as a question to show the amount of work. The clause needs another clause for it to form a full meaning.
The word can also be used in statement of a sentence rather than asking a question. Based on nature, the work has been used; it will be easy then to determine whether it is a question or a statement.
