【C13】A．ImmunityB．AddictionC．ExposureD．Reaction

【C15】A．vulnerabilityB．reactionsC．exposureD．worries

What was the Ukrainian football fans reaction to the Russian team？A．They were indifferent

The Cubist movement in art was a reaction against traditional methods of portray reality.

Teachers warn students that （) to computer games is dangerous.A、likingB、addictionC、prefe

【C2】A．contactB．showC．exposureD．breath

Normally, when hearing compliments, a typical Chinese reaction is to show（).