Some nouns are always used in a plural form and always take a plural verb.
Trousers, scissors, spectacles, stockings, shorts, measles, goods, alms, premises, thanks, tidings, annals, chattels, etc.
Example
(A) Where is my trousers? (correct use- are)
(B) Where are my trousers? Correct
(A) Spectacles is a costly item. (correct use- are)