Question

Choose a suitable adverb clause to complete the sentence:
I usually drink a glass of warm milk .

• A. before I go to bed
• B. while sleeping in the night
• C. by bed time
• D. none of the above

Answer 1

The correct option is A before I go to bed

An adverb clause is a group of words containing a subject and a verb, and it functions as an adverb, by modifying an adjective, verb or an adverb. Adverb clauses generally begin with a subordinate conjunction (since, because, while, etc.).
Option A is correct because it is an adverb clause of time, 'before' is a subordinate conjunction that refers to time.
Option B is incorrect because it is a phrase. Moreover, it is irrelevant here, no action can be done in consciousness while one is sleeping.
Similarly, option C is incorrect because it is a phrase, not a clause.
Option D is incorrect because the answer lies in A.