[ Commas and Subordinating Conjunctions ]
Which sentence correctly uses a comma?
A. She excels in mathematics because she enjoys solving complex problems.
B. She excels in mathematics because, she enjoys solving complex problems.

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Prepositions and Phrasal Verbs › ViewHe stood …… his principles and refused to change the rules.
A. by
B. up
C. for
D. against
Intensifiers: Really vs Very › View
He had to wait until the ______ end to bring up the topic.
A. really
B. very
C. both
Tenses › ViewHe _____ reading a book at this moment.
A. is
B. are
C. am
D. be
Prepositions › View
I dreamt …………………….being a pilot
A. at
B. about
C. of
D. in
