Question

Select a suitable adverb clause (conditional) to complete the sentence:
, we will immediately sign on these papers.

• A. After agreeing to the terms
• B. Provided that you have agreed to the terms
• C. Upon agreeing to the terms
• D. None of the above

Answer 1

Answer: (B)

Provided that you have agreed to the terms

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 condition, 'provided that' is a subordinate conjunction that refers to a condition; it means 'on condition that'.
Option A is incorrect because it is a phrase, not a clause.
Similarly, option C is incorrect because it is a phrase.
Option D is incorrect because the answer lies in B.