Variant 1 You could have come first and won the race if you … faster

17. Today I feel ... than yesterday.

A) good B) worst C) well D) far better

18. There's ... any meat left. We must buy some when we go shopping.

A) likely B) hardly C) surely D) fairly

Many scientific advances are intensively used in the work of the police and the army. The US company, “Scientific Application and Research Associates" (SARA) Inc. has developed crowd-dispersal weapons for the US military that generate high-intensity sound waves. Sound levels of 120 to 130 decibels cause pain and blurred vision; above 140 decibels, sound produces profound discomfort throughout the body. Earplugs are no protection. These acoustic systems have a directed beam, projecting the sound in a narrow fan. They include high-intensity sound generators with power levels of up 60 kilowatts and are combustion driven, using a series of small explosions to create a noise or drive a siren or whistle.