[ Vocabulary and Phrases ]
A tram and an underground are both types of ______.
A. public transport
B. private cars
C. airplanes
D. shopping centers
Select your answer:

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Vocabulary and Grammar › View_______ energy is produced by collecting sunlight and converting it into electricity.
A. hydro electricity
B. nuclear
C. solar
D. wind
Collective Nouns › View
A ____ of chickens
A. stack
B. constellation
C. pride
D. brood
