Choose the best option that best completes the gap(s) The_____event takes place every two years

Analyze the question: The sentence says the event takes place "every two years." We need the word that means once every two years, and it must be spelled correctly.

Explain the concept: Two words are easy to confuse:

• Biennial means happening every two years (or lasting two years).
• Biannual means happening twice a year (like semi-annual).

Option A, "bienial," and option D, "biannal," are misspellings, so they are not valid words.

Solution:

1. "Every two years" points to biennial.
2. A. bienial is misspelled (it is missing an "n"), so it is wrong.
3. B. biannual means twice a year, so it is wrong.
4. C. biennial is spelled correctly and means every two years, so it is correct.
5. D. biannal is not a word.

The sentence reads: "The biennial event takes place every two years."

Answer: C. biennial.

Tip: Link the "e" in biennial with "every two years" (both have the "e" sound), and the "a" in biannual with "twice a year." Also remember that biennial has a double "n" (bi-enn-ial), which is a common exam trap.