[ Vocabulary ]
Which word means an exchange of goods and services
A. Subsistence
B. Bartering
C. Supply and Demand
D. Corruption
Select your answer:

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Interrogative Pronouns › ViewQ: _________ bus do they take to go to Sunway Lagoon?
A: We should take the blue one.
A. Whose
B. Which
C. Why
Grammar › View
What is it?
A. Bag
B. Book
C. Box
D. Pen
