Answer:
because I have to finish working first.
Explanation:
<h3><u>Subordinate clause:</u></h3>- A group of words that contains a verb and when placed separately, doesn't make sense is called a subordinate clause.
- A subordinate clause contains a proper subject and verb.
- It always starts from a conjunction.
Here, the conjunction is "because". So, the subordinate clause is "because I have to finish working first."