Which sentence contains a present-simple-passive agreement error with a plural subject?
Fresh towels are supplied on request.
Each locker is cleaned after use.
The parcels is sorted by postcode.✓Correct answer
Two receipts are printed for every return.
Explanation
The sentence about the parcels contains the error because parcels is plural but is is singular. The nearby locker sentence is grammatical because its singular subject correctly takes is before stored.