【C20】A．factB．caseC．resultD．contrast

A．produceB．leadC．resultD．act

【C18】A．finishB．closeC．resultD．end

【C16】A．GivenB．In caseC．Only ifD．Providing

A．problemB．causeC．resultD．resource

【C8】A．factB．contrastC．additionD．consequence

【C6】A．timeB．caseC．fearD．consequence