The first clause is a cause therefore

[Leon]

English Grammar Tests, Elementary Level

ESL/EFL Test #104 "Conjunctions: and, but, or & so", question 9

My brother wanted to buy a novel ......... I went to the book store after I finished work.

(a) so
(b) or
(c) but

English Grammar Tests, Elementary Level

ESL/EFL Test #104 "Conjunctions: and, but, or & so", answer 9

My brother wanted to buy a novel so I went to the book store after I finished work.

Correct answer: (a) so

Your answer was: incorrect
My brother wanted to buy a novel or I went to the book store after I finished work.
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i dont think that is the correct answer because the first clause is an a cause therefore so should be used to signal that the second clause is the effect.

Leon

[Pamela]

Sentence with so is right.
My brother wanted to buy a novel so I went to the book store after I finished work.

or is often used in interrogative sentences mainly in alternative questions

[Mister Micawber]

.
It seem like cause-and-effect to me, Leon:

Cause: My brother wanted a novel.
Effect: I went to the bookstore.
.
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Native English teacher at Mister Micawber's