Time to Test Yourself Unit 8

1. Write the sentences with modal and passive form. a. A helmet must be worn by all motorcycle riders.b. Your documents will be checked at passport control.c. These instructions should be followed carefully.d. Your computer can be fixed in a couple of days.e. These tickets must be paid for by next Friday.f. Your car could be clamped if you park there.g. Files can be downloaded with this cell phone. 2. Match. Printing was a significant invention that made books widely available. Gunpowder was invented in China, where it was used in fireworks. The first mass pruced car was the Ford Model T, which was available only in black. Alexander Fleming was a Scottish scientist who discovered penicillin by accident. Silicon Valley is a place in California where many high-tech companies are based. Albert Einstein was a German scientist who emigrated to the USA. The first computers could break codes that humans couldn´t decipher.