题目内容
某工程双代号网络计划图如下图所示，其关键线路有()条。
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第二节 完型填空
阅读下面短文，从短文后所给各题的四个选项(A、B、C和D)中选出能填入相应空白处的最佳选项。
Tom has been filled with fear since the plane took off. Now, the fear 【B1】 to terror(恐怖) as the red light comes 【B2】 . He gets up with difficulty from his seat and moves into 【B3】 in the open door-way of the plane. He fixes his 【B4】 on the red light, and hopes that something will go wrong and something to 【B5】 the red light from changing to green. He 【B6】 what lunacy (精神错乱) decided him to take 【B7】 this sport, but he knows that it is too 【B8】 now to turn back. He remembers the 【B9】 of his instructor during the weeks of 【B10】 . His instructor said: "However often you 【B11】 , you will probably never 【B12】 the fear of it. You'll begin to feel 【B13】 as soon as the plane is in the 【B14】 , and you'll have some 【B15】 of pure terror while you're waiting to jump. 【B16】 after that you'll have your prize. When the parachute (降落伞) opens, you'll have the most pleasant experience of your 【B17】 . I promise you that."
The memory of the promise makes no 【B18】 ; he continues to pray that something will go wrong and 【B19】 the whole thing.
Nothing goes wrong. The light turns green. The jumpmaster taps him on the shoulder, 【B20】 . into his eyes eagerly, and shouts, "Ready？ Okay. Then out."
【B1】
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