Duolingo English Test Practice Test 13

My grandmother keeps her spare house key under a flower pot near the back do of the kitchen. Talented as she was, the goalkeeper could do nothing about the powerful shot that flew into the top cor. Suppose the internet stopped working for a week; how would you contact your friends, pay bills, and find inf? There's no point arguing about it now; we should simply apologise and mo on with the project. Weddings in my village last three days, with music, dancing, and enough food to feed the entire val. This weekend we are going to visit my aunt, who lives in a small vill near the sea.

Before the printing press was invented, every single book had to be copied out by hand. A skilled mo might spend an entire year producing just one decor Bible, which meant that books were extremely rare and mainly owned by wealthy instit. Once mova type made it possible to print hundreds of identical pages in a single day, prices fell sharply and lite slowly began to spread beyond the nobi and the clergy. Pamph, newspapers, and eventually novels reached ordinary readers, and this flo of printed material helped fuel scientific debate, religious ref, and political revol across Europe.

Before the traffic light existed, city crossings were controlled by police officers who stood in the middle of the road waving flags or their arms. In London in 1868, a railway engineer named John Peake Knight designed a tall signal with red and green gas lamps that a policeman Select…operatedoperateoperating by hand at night. It worked for a few weeks until a leaking gas pipe caused an explosion that injured the officer. The idea was quietly Select…abandonedabandonabandoning. Decades later, in the United States, several inventors experimented with electric versions, and in 1920 a Detroit police officer named William Potts is often credited with building the first automatic three-colour light, using leftover railway signal parts. Other cities were already testing similar systems, so the true credit is disputed. Early lights had no yellow phase, and drivers often complained that the sudden switch from green to red caused crashes. The amber light, giving drivers a moment's warning, Select…followedfollowfollowing soon after and quickly became standard. Synchronising lights along a whole street took longer to achieve, since it required cities to lay underground cables and, later, computers to time the phases. Today, sensors buried in the road or mounted on poles can Select…detectdetectsdetecting waiting traffic and adjust the timing automatically, something Knight's gas lamp could never have done.