Did you know that 95 percent ___ the world's opals ...

[ Mixed General Quiz ]

Did you know that 95 percent ___ the world’s opals are mined in Australia?
a. on
b. at
c. of

Select your answer:
A B C D E

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Conjunctions & Interjections Grammar and Sentence Structure Simple Present - Negative & Interrogative Simple Present & Present Progressive Present Perfect Simple vs Continuous Common & Proper Nouns Should and Shouldn't Auxiliary Modal Grammar - Be going to Relative Pronouns with Prepositions

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Siena, is a medium- ___ city in Europe.
a. size
b. proportion
c. measured
d. sized