Choose the correct word(s) that correctly completes the sentence.
Where _______ your spectacles?
(A) is
(B) are
(C) has
(D) have

Hint: We need to choose an appropriate word, in such a way that the meaning of the sentence does not change. Subject-verb agreement should be maintained. Try placing each of the options in the sentence and understand the meaning behind the sentence.

Complete answer:
In English grammar, for subject-verb agreements to take place: A singular verb is the only verb form that can follow a singular subject, in a similar way a plural verb is the only type of verb that can be used by a plural subject.

We are given a sentence where the subject is the noun ‘spectacles’, clearly the subject noun is of the plural form. So ‘spectacles’ will most definitely utilize a plural verb. The required verb when placed in the given sentence, should give a meaning to the sentence that enquires the placement of the ‘spectacles’.

Let us examine each option carefully:
Option (A) is, this is an incorrect answer. For the given question, we need a plural verb, but the verb ‘is’ is of the singular form. Hence this option may be rejected.
Option (B) are, this is the correct answer. Here we were in need of a plural verb to represent the plural noun ‘spectacles’. Since ‘are’ is a plural verb and the placement of ‘are’ in the given blank forms a sensible sentence, this is the right option.
Option (C) has, this is an incorrect answer. When this word is used in the blank, the sentence loses meaning and its grammatical structure since it leaves the sentence in an incomplete manner. This verb ‘has’ is the verb used for singular nouns so it can be rejected directly.
Option (D) have, this is an incorrect answer. Even though ‘have’ is used for plural forms, the meaning of this verb is ‘to possess’. If we use this verb in the blank, then it alters the meaning of the sentence, hence the option must be rejected.

Therefore the correct answer is clearly option (B) i.e, ‘are’.

Note: Note that the given sentence is in the interrogative format, we understand this due to the usage of a question word ‘where’. In interrogative sentences remember that sometimes question words will not be used, instead there is a subject-verb inversion. So in such cases, if we need to find the subject of a sentence from the interrogative sentence, we just need to look at the second term or the term after the verb.