【C19】A．producedB．createdC．manufacturedD．invented

A．thoughtB．createdC．supposedD．caused

【C6】A．employedB．createdC．operatedD．controlled

A．stoppedB．createdC．calledD．mentioned

【C12】A．producedB．createdC．improvedD．facilitated

【C7】A．adjustedB．createdC．adoptedD．presented

【C3】A．employedB．createdC．operatedD．controlled