1. A. done B. discovered $\text{C. invented}$ D. manufactured
2. A. any $\text{B. longer}$ C. doubt D. sooner
3. A. during $\text{B. until}$ C. since D. after
 4. $\text{A. use}$ B. play C. performance D. display
 5. $\text{A. For}$  B. In  C. At  D. From

Traffic lights only became necessary in the 19th century, when traffic began to increase. A traffic signal (1) ______ by J O Knight, a railway signaling engineer, was installed outside the Houses of Parliament in London in 1868. It looked like a railway signal of the time but a few weeks later it blew up and signal of this type were no (2) ______ used. The modern traffic light is an American invention, the first red and green lights set up in Cleveland in 1914 followed a few years later by three-color lights in New York. These new lights didn’t arrive in Britain (3) ______ 1925. A yearlater, the first automatic lights were installed at a road junction in Wolverhampton, where they remained in (4) ______ for the next 42 years. (5) ______ the beginning of the 1930s, the first vehicle-activated lights were set up in London. Since these early days, traffic light design has developed to cater for different types of road user.

1. A. done B. discovered C. invented D. manufactured

2. A. any B. longer C. doubt D. sooner

3. A. during B. until C. since D. after

4. A. use B. play C. performance D. display

5. A. For B. In C. At D. From