Everything would be … cheaper in the sales.

Analyze the question You need an adverb that fits the comparative "cheaper" and collocates naturally with it. The sentence is: "Everything would be _ cheaper in the sales."

Explain the concept Words that modify a comparative adjective (cheaper, bigger, better) are called degree modifiers. Only certain adverbs are used with comparatives, such as much, far, a lot, slightly, significantly, considerably, substantially. Others do not pair naturally with them, even if they sound similar in meaning.

Test each option

• A. greatly cheaper: "Greatly" is normally used with verbs (greatly improved, greatly appreciated) or with some past participles. It is not idiomatic before a comparative adjective like "cheaper."
• B. considerably cheaper: "Considerably" is a standard collocation with comparatives (considerably cheaper, considerably better, considerably larger). It fits perfectly.
• C. strongly cheaper: "Strongly" goes with words like recommend, believe, oppose, disagree. It does not describe a price difference.
• D. most cheaper: This is wrong because "cheaper" is already comparative. It is a double comparative (like "more better"), which is ungrammatical. The correct superlative would be "cheapest."

Answer The correct sentence is: *Everything would be considerably cheaper in the sales.

Tip When a blank comes right before a comparative adjective (-er or "more ..."), think of "much, far, slightly, considerably, significantly." Also, eliminate "most" or "more" immediately, because double comparatives are always wrong in WASSCE.