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Put the verbs given in brackets in the necessary form.

1. Cashiers often (to make) mistakes doing a lot of calculations every day. 2. Punched cards (to use) by J. M. Jacquard to program his loom. 3. People greatly (to change) computers lately. 4. During the experiment the machine (to break) down and (must repair). 5. Our programmer (to write) programs for the computer all day long yesterday. 6. He (to finish) his work before 7 o’clock. 7. When the lesson (to be over), we (to switch) the computer off. 8. What idea Charles Babbage (to have)? He (to design) a fully programmable mechanical computer. 9. We (to use) computers for three hours to solve those mathematical problems. 10. The problems (not to solve) before the necessary algorithms (to input) into the computer

1. Cashiers often make mistakes by doing a lot of calculations every day. 2. Punched cards for use by J. M. Jacquard to program his loom. 3. People are changing computers a lot lately. 4. During the experiment, the car broke down, went out of order and needs to be repaired. 5. Our programmer spent all day yesterday writing programs for the computer. 6. He finished his work before 7 o'clock. 7. When the lesson ended, we turned off the computer. 8. What is Charles Babbage's idea? He designed a fully programmable mechanical computer. 9. We used computers for three hours to solve these mathematical problems. 10. Tasks are not solvable until the necessary algorithms are entered into the computer