Question

Complete the sentence with a suitable adverb clause:
Eat slowly .

• A. lest you should get indigestion
• B. and eat all of it if you like
• C. for you have time
• D. None of the above

Answer 1

The correct option is A lest you should get indigestion

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 purpose, 'lest...should' is a pair of conjunctions that refers to purpose: 'to avoid getting an infection'.
Option B is incorrect because it contains a coordinate/independent clause ('and' is a coordinating conjunction) whereas an adverb clause is subordinate/dependent.
Similarly, option C is incorrect because it is a coordinate clause.
Option D is incorrect because the answer lies in A.