Question

To form the comparative degree of adverbs, you should add which of the following words? A. Great or little B. All or none C. More or less D. Most or least

Answer 1

Answer: To form the comparative degree of adverbs, the words (C.) more and less should be added.

Explanation: Adverbs are words that are used to modify verbs, adjectives or other adverbs. Moreover, there are different types of adverbs, such as adverbs of time, adverbs of condition, adverbs of place and adverbs of degree. In some cases, to form the comparative degree of adverbs, it is enough adding the suffix -er at the end of the word, such as in "faster" or "quicker"; however, in other cases, it is necessary to add the words "more" or "less" before the adverb in order to form the comparative degree. These two words are generally added when the adverb ends in -ly.  

Answer 2

The correct answer is C. more or less.

Comparative forms of both irregular adjectives and regular adverbs is formed by adding words more (if the comparison is positive) or less (if the comparison is negative). For example:

He finished his work more carefully than I did.

As you can see here, the adverb carefully is combined with more to form its comparative form. If you want to make a superlative, you will use most or least.