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ПОМОГИТЕ ПОЖАЛУЙСТА!!!

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

Два човни на озері з'єднані канатом. Люди, сидячи у човні, за допомогою каната підтягують човни один до одного. Порівняйте рух човнів відносно води.