[ Mixed General Quiz ]
The Ohio River is one of the most important rivers ___ the United States.
a. on
b. at
c. in
Random Topics:
Some vs. Any Correlative ConjunctionDesert vs. Dessert Present Simple VS ContinuousWh-QuestionSingular and Plural NounsGrammar Present Perfect (ever never)Present Simple and Present Continuous TenseConditional Clause
Other quiz: Grammar
This is the school __________ my parents studied.
A. who
B. whose
C. which
D. where
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