[ Grammar ]
Christopher Columbus _______ American more than 500 years ago.
A. discovered
B. has discovered
C. had discovered
D. had been discovering

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Grammar › ViewHe refused to go until he……..seen all the paintings.
A. had
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Grammar › View
Identify the sentence that correctly uses commas in a list where items themselves contain commas.
A. On my trip, I visited Paris, France, Berlin, Germany and Rome, Italy.
B. On my trip, I visited Paris, France; Berlin, Germany; and Rome, Italy.
C. On my trip, I visited Paris France, Berlin Germany, and Rome Italy.
D. On my trip, I visited Paris, France Berlin, Germany and Rome, Italy.