2. he reads hard lest he <u>should</u> fail
The circus came to town, and the tickets were cheap, so I decided to go with my friend.
Answer:
The correct answer is: How does electromagnetic force works.
Explanation:
In this excerpt, the author tries to understand how does electromagnetic force works.
We can conclude that from some statements he uses to explain his experiment.
e.g. <em>Electromagnetic force sounds very complicated, but I wanted to understand how it works.</em>
e.g.<em> This experience helped me understand electromagnetism and the way it works.</em>
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