【C13】A．concerningB．consideringC．regardingD．disregarding

【C13】A．organizationalB．organizationC．organizingD．organized

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

【C13】A．therebyB．maybeC．thanD．otherwise

【C13】A．subtitlesB．provisionsC．providenceD．subjection

【C20】A．considerableB．consideringC．consideredD．considerate

【C20】A．followingB．consideringC．astonishingD．appreciating