Have they not prepared for the examination.
No it is not. It is an adverb phrase since it lacks a subordinating conjunction.
Adverb clauses must be preceded or started by a subordinating conjunction such as after, if, because or although. For a sentence to qualify as an adverb clause it must include in its body a subject and a verb.
As a general rule you can use the following formula:
An adverb clause equals a subordinate conjunction plus a subject plus a verb, and it should be answering how? when? where? or why?
Answer:
A. It was a perfect day to relax. Fluffy clouds floated in the sky. The sun shone brightly. A soft breeze rustled the leaves.
Explanation:
Answer:
A.the landlord says we must pay extra deposit because we have all these pets.
Answer:
I think the best answer would be he died of an unknown illness because Mr. Summers is referring to a man that is Watson. Normally people refer "head" of the family as the man. And since his mother is assumed she's alone, she has a man to do the work. I don't think I explained this properly but I hope it helps! :)