The president made a … appeal for calm in the face of the crisis.

Analyze the question: You need the word that best completes "The president made a ____ appeal for calm in the face of the crisis."

Check the options:

• A. passionnate: This is a misspelling. The correct spelling is passionate (one "n" in the middle: pas-sion-ate). It means showing strong emotion or deep feeling. A passionate appeal is a very common collocation, and it fits a leader urgently pleading for calm.
• B. zealous: This means showing great energy or enthusiasm for a cause. It usually describes a person ("a zealous supporter"), not an appeal, so it does not collocate well.
• C. tactful: This means careful not to offend. It is possible, but "tactful appeal" is weak. Appeals for calm in a crisis are marked by emotion and urgency, not by diplomacy alone.
• D. sensitive: This describes a person or a topic ("a sensitive issue"). It is not normally used for an appeal.

Key idea (collocation): English has natural word partnerships. "Make a passionate appeal" is a standard, frequently used phrase, while the others sound awkward with "appeal."

Answer: A, passionate.

Exam tip: In "best completes the sentence" questions, test each word against the noun it modifies. Ask, "Would a native speaker naturally say this?" Also remember the spelling: passion + ate, with a double "s" and a single "n".