[ Tenses - Present and Past ]
To preserve natural habitat, the government__________ (establish) six national parks so far.
A. established
B. establishes
C. has established
D. is establishing
Select your answer:
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Modal Verbs › ViewFill in the gap: “To finish with the rules, you ______ clean up after yourself.”
A. might
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I visit the Grand Canyon _________ I go to Arizona.
A. once
B. whenever
C. wherever