Cloze Test Set 5: Question 2

Q:

Fill in the blank (2) 

  1. Secure
  2. Protect
  3. Effect
  4. Nail Down
  5. Ensure
Level: Medium

Option E

ensure- make certain that (something) will occur or be the case
The sentence is about salt makers who have to ensure 30 ppm of iodine in their products(ware). So, option(e) best suits the particular sentence in accordance of the sentence.

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