Select the most appropriate option to fill in the blank no. 8.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. is.
- In the passage, we need a verb that describes the action of causing or being responsible for something. The context is about what causes a cold.
- "Is" fits well here because it indicates that the common cold is caused by something, which matches the subject ("a cold") in the sentence. It presents a direct statement.