Read the text. Then choose the correct answer to questions 30-32

b) The existing drugs were not as safe as to use for prevention of the disease as well as a cure.
c) There existed no pharmaceutical solutions to treat the disease.
d) The drugs that were routinely used were reliable but not active long enough
20. The first remedy for the disease dates as back as to 300 years ago even though...............
a) it was historically recordable as important for the disease.
b) reliable drugs were not discovered until after 1943.
c) only the bark of a North American tree was the solution.
d) it was venomous and unsafe to use as tolerably as those drugs used now.
21. Chloroquine is different from quinine in that.........................
a) it was developed by the military during a war
b) it was twice as potent as quinine although it had certain weaknesses
c) it could be taken to prevent the disease as well as to cure it after infection
d) unfortunately, it was not so reliable as the latter
The death rate from heart disease has dropped by half since the mid-1960s. However, studies consistently find that the improvement has less to do with treatment than with changes in diet and lifestyle. In a 1988 study Dr. Lee Goldman, a Harvard cardiologist, analyzed the decline in cardiac death
between 1968 and 1976. Even though he could not account for all of it, he traced more than half to the drop in cigarette smoking and cholesterol intake. Roughly 20 percent of the drop was due to heart and blood-pressure drugs, and only 3.5 percent to bypass surgery. Goldman has lately updated his findings, and he says the same basic lesson still holds: "The
impact of the costliest interventions is minimal."
22. The recent drop in deaths from cardiac diseases
a) is owing to people's eating less than they need
b) is due to blood-pressure drugs and carefully watched diets
c) can be attributed to bypass operations
d) can be associated with changes in people's eating habits and lifestyles
23. What is meant by "The impact of the costliest interventions is minimal?"