[ Tenses ]
Columbus…….America more than 400 years ago.
A-discovered
B-has discovered
C-had discovered
D-he has gone
Select your answer:
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Modal Verbs › ViewThey have a lot of money.
A. They could win the lottery.
B. They must have win the lottery.
C. They must win the lottery.
D. They might have won the lottery.
Vocabulary › View
a scientific test to try out something in order to learn about it
A. eyewitness
B. firsthand
C. theory
D. experiment