1. Complete this newspaper article with the correct form of make or cause.
A power cut 1 caused the city's traffic control computer system to stop working again yesterday morning. This 2 …………… enormous traffic jams throughout the city centre, as traffic lights stopped working. As well as 3 …………… thousands of people late for work, the chaos on the streets also 4 …………… a lot of accidents. Emergency vehicles were unable to reach accidents in time, since the traffic jams 5 …………… it impossible for them to cross the city quickly. A driver we interviewed said, "The new computer system was supposed to 6 …………… things easier for us, but since they started using it, it's just 7 …………… so many problems. It never works properly. This kind of thing 8 …………… me so angry."