Spatial Locality in Cache - Which addresses are loaded?
When inserting an entry in the cache, an entire block of addresses is copied. In your case 2 words (8 bytes) are inserted.

So when address 12 is reached, the block of 8 bytes  having address 12 is inserted into cache. 

Likewise in case of subsequent misses a maximum of 8 such "blocks" can be inserted into cache, after which eviction process shall start. Further sequence of cache hits/misses shall depend on the eviction policy.