Our long _________ with your company has brought great benefits.
A. implication
B. resistance
C. association
D. substance
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They also warn that these countries are among the most_________to climate change.
A. lax
B. vulnerable
C. addictive
D. nasty
Some college students may _________net surfing, which impairs their physical and mental health.
A. be addicted to
B. be supposed to
C. be added to
D. be opposed to
Throughout history, ____________________________________________________.
Members __________________________________________.