Question

Fill in the blank with a suitable adverb clause:
I will go to sleep .

• A. soundly tonight
• B. when I finish my project
• C. by 10 o'clock
• D. none of the above

Answer 1

Answer: (B)

when I finish my project

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 B is correct because it is an adverb clause of time, 'when' is a subordinate conjunction that refers to time.
Option A is incorrect because it is a phrase, not a clause.
Similarly, option C is incorrect because it is a phrase, not a clause.
Option D is incorrect because the answer lies in B.