Fill in the blank with a word containing sound /k/

Exercise 1. Fill in the blank with a word containing sound /k/.
accountant
knee
column
antique
1. I didn't have time to read the whole article - just the first _____________.
2. John works as an _____________ for a large corporation.
3. My grandmother gave me an _____________ clock that's been in our family for generations.
4. My _____________ hurts after running in the marathon last weekend.