17 What did people once think about lightning?

[A] It was a natural phenomenon

[B] It was a weapon

[C] It came from the God

18What did Benjamin Franklin invent in 1752?

[A] The first fishing rod

[B] The first lightning rod

[C] Lightning

19Which of the following statements is NOT true

[A] About one person per day dies from lightning in theU.S.

[B] About 365 persons per year die from lightning in the U.S.

[C] About one person per hour dies from lightning in the U.S.

20Where is it safe to stay during an electrical storm?

[A] At open doorways [B] In a closed car [C] On the high ground