Question

Choose a suitable adverb clause to complete the sentence:
The test was so easy .

• A. that I'm sure that everyone will score well
• B. but the marking was very strict
• C. today
• D. None of the above

Answer 1

The correct option is A that I'm sure that everyone will score well

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 result or consequence, 'so...that' is a pair of conjunctions that refers to a result: "so easy that...everyone will score well".
Option B is incorrect because it is a coordinate/independent clause, whereas an adverb clause is subordinate/dependent.
Option C is incorrect because it is only a word, not a clause.
Option D is incorrect because the answer lies in A.