1. A new technique _________, the yields as a whole increased by 20 percent. A. working out B. had been worked out C. having been worked out D. having worked out
2. When attention is absorbed ______ fear, we are distracted from what is actually going on. A. by B. with C. in D. for
【长难句翻译】 The food supply will not increase nearly enough to match this, which means that we are heading into a crisis in the matter of producing and marketing food.
