1)Multiple choices: TRAFFIC LIGHTS The first trafic signal was invented by a railway-signaling engineer.It was installed (1).............the House of Parliament in 1868. It (2).............like any railway signal at the time,and was operated by gas. (3).................,it exploded and killed a police-man, and the accident (4)............... further development until cars became common. 1) a. outside b. out c. out of d. outdoors 2) a.resembled b.looked c.showed d.seemed 3) a.However b.Therefore c.Although d.Despite 4) a.forbage b.disappointed c.avoided d.discouraged