Each person's signature is ________. For example, my signature is different from anyone else’s.
A) huge
B) large
C) extra
D) unique
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His business went under because of _________ from the large corporations (公司).
A) communication
B) concept
C) competition
D) fake
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