For most people in the villages, it is more ________ to travel by car.
A. edge
B. effect
C. economical
D. economic
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You cannot hold a party in our house _______ you clean everything up after it.
A. unless
B. until
C. if
D. as long as
Carolyn has got the award because she has ______ over others of knowing many languages.
A. an advantage
B. an advancement
C. the advantage
D. advancements
The railroad connects two big cities, ________ (name), New York and Chicago.
If there were more containers, the goods ______ (transport) to Australia.