General Vocabulary Exercise Use the appropriate form of the word given in brackets to fill in the corresponding blank. 1 The of marijuana does not prevent many people from using it. (legal) 2 He worked to perfect his technical and improvisational skills. (ambition) 3 Unfortunately, such practices often go unnoticed. (discriminate) 4 Henry Ford was a individual who built one of America's largest industries. (persist) 5 Because of this low to cold, they can be seriously damaged when temperatures drop below freezing. (resistant) 6 in the water and air can create serious health hazards. (contaminate) 7 He was surprised to discover that his driver's license was ; it had expired the previous week. (valid) 8 The water around the islands is clear, giving underwater swimmers a great view of fish and rock formations. (fantasy) 9 The space program has strict requirements for its astronauts, that they be in excellent physical and mental health. (specify) 10 Walt Disney's movies and cartoons children and grown-ups since 1926. (amusement) 11 The disappearance is so sudden as to seem . (magic) 12 His parents were kept of the fact that he failed in the examination. (ignorance) 13 You'll have to learn to make difficult decisions if you are to in business. (survival) 14 Lewis and Clark the Northwest. (exploration) 15 The gang tried to the merchant. (timid) 16 The package is light but it's too to carry. (bulk) 17 Devout Muslims must make a to Mecca. (pilgrim) 18 I saw a of lights on a hillside, marking a village. (galactic) 19 His brain operation caused a great in his character. (transform) 20 The Prime Minister's policy many backbenchers. (alien)