題組   Vespas are made by a company called Piaggio. During World War II, bombs damaged the company’s factories. The war also damaged many Italian roads. So  11  . the war, people needed a cheap way to get around on bad roads. Piaggio asked an airplane engineer  12 . the problem. He designed a light, comfortable scooter. It was easy to drive, easy to fix, and it  13. the rider’s clothes clean. It was also easy for both men and women to ride. The new scooter made a unique sound  14.   an insect. So it was called the “Vespa,” which means “wasp” in Italian. The Vespa quickly became very popular and has become a symbol of Italian style.
【題組】11.
(A) before
(B) after
(C) when
(D) because