Answer:
Some banks start work at 8:30am.
Step-by-step explanation:
Verbs are often used with an S at the end of them when the subject is singular. When the subject is plural, it is likely that the verb has no S.
For example, if we analyze subject and verb combinations, we see the following pattern displayed.
Singular:
John walks
The dog runs
Disney Land opens
The house smells
Plural:
The boys walk
The dogs run
The parks open
The houses smell