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

Random Topics:
Conjunctions & InterjectionsGrammar and Sentence StructureSimple Present - Negative & InterrogativeSimple Present & Present ProgressivePresent Perfect Simple vs ContinuousCommon & Proper NounsShould and Shouldn'tAuxiliary ModalGrammar - Be going toRelative Pronouns with PrepositionsOther quiz:
Continuous Tenses › ViewWhat is the present continuous form of ‘to write’ for the subject ‘she’?
A. is writing
B. writing
C. was writing
D. writes
Grammar › View
What is the complete predicate in this sentence?
Garret, Amy, and Liza walked their dogs yesterday.
A. Garret, Amy, and Liza
B. Garret, Amy, and Liza walked their dog
C. walked their dog yesterday
D. walked their dogs
Grammar › ViewA: What did Grace _____ two hours ago?
B: She washed the car.
A. do
B. does
C. did
D. doing
Mixed General Quiz › View
Siena, is a medium- ___ city in Europe.
a. size
b. proportion
c. measured
d. sized
