Answer:
zur
Explanation:
Meine Oma will nicht <em>_zur_</em> Post gehen.
My grandma doesn't want to go to the post office.
zu + der = zur
Hope this helps ^-^
In this sentence, "das Buch" is in accusative case, as it's the direct object.
The workers came to work late.
The workers came to work late.
The workers were late for work.
The workers were late for work.
You mean, "What is door in German?" It's Tür!