词汇运用 1. Researchers in this field ________(有了一些重大的新发现). 2. At what age are children able ________(明辨是非)? 3. A bicycle ________(比汽车更方便) in towns. 4. There was a ________(普遍希望他会赢). 5. The details of today's flights ________(列在显示屏上). 6. The contract had been ________(有效地) drawn up. 7. We ________(收到400份申请) for the job. 8. The ice is too thin ________(承受不住你的重量). 9. The helicopters ________(像两个小黑点出现) on the horizon. 10. Someone ________(轻轻叩门). 11. State your reasons ________(按重要性顺序).