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Computers can solve difficult problems. One day a famous general was given a computer which (be) ____ able to answer complicated questions on war problems. The War Office also (send) ____ an expert to fix the computer. The general (think) ____ hard over an important military problem for a long time and the computer (bring) ____ at the right moment to help the general. It (take) ____ the general ten minutes to set the problem. “The enemy just (open) ____ fire from the south.” The general wanted to know what the results (be) ____ if he (attack) ____ the enemy or if he (remove) ____ his army. The computer (start) ____ (work) ____ at once. While the computer (operate) ____ by the expert, the general (watch) ____ the screen (flash3) ____. At last the answer (received) _____ “Yes”. The general’s face (grow) ____ dark red. He shouted at the top of his voice: “Yes, what?” The computer (get)____ down to work again.
“Yes, sir!”. It (be)___ half an hour later when the next answer (come) ____.
“Yes? Sir!”