The committee is charged with finding a … solution to the crisis

Analyze the question: The sentence asks for a word that best describes the kind of solution a committee should find for a crisis. We need an adjective that collocates naturally with "solution" in this context.

Explain the concept: This tests collocation, which means knowing which words naturally go together in English. A crisis is a serious problem, so a good solution is one that solves it for good, not just temporarily. The phrase "a lasting solution" is a common, standard expression.

Test each option:

• A. lengthy: Describes something that takes a long time (a lengthy speech). A "lengthy solution" would suggest a long, drawn-out answer, which is not the intended meaning.
• B. current: Means happening now. A "current solution" doesn't fit, because the committee is looking for a new solution rather than the one that exists at present.
• C. lasting: Means permanent or enduring. "A lasting solution to the crisis" is a natural collocation and gives a sensible meaning: a solution that will end the crisis permanently.
• D. strong: We say "strong evidence" or "a strong argument," but "strong solution" is not idiomatic.

Tip: For fill-in-the-blank vocabulary questions, ask yourself, "Which word do I usually hear with this noun?" Phrases like lasting solution, lasting peace, and lasting impression are very common in WASSCE and JAMB English. Learn words in pairs, not alone, and you will spot the right answer quickly.