His business went under because of _________ from the large corporations (公司).
A) communication
B) concept
C) competition
D) fake
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With the changes in the world's climate (气候), dinosaurs died, but many smaller animals lived on. It was the _________ of the fittest.
A) language
B) survival
C) loyalty
D) mass
I want to ask for leave tomorrow, because I have a doctor's _________ tomorrow morning at nine o'clock.
A) appointment
B) energy
C) context
D) blog
We don't _________ our customers to be mere consumers; we think of them as our friends.
A) press
B) consider
C) owe
D) limit
Have lunch together if you like, but don't ________ for sure until next month.
A) outlast
B) decide
C) value
D) tend