52. According to the passage, how many of the test results were unexpected?
One
Two
Three
Eight
53. According to the passage, what effect does cheddar cheese seem to have?
It interferes with the function of teeth.
It decreases the rate at which teeth decay.
It helps in the digestion of food.
It makes sugar taste sweeter.
54. It can be inferred from the passage that the research on the relationship between cheese and tooth decay ……………… .
will be slowed considerably
will be continued
has been discredited
has been founded to conclusive
55. Researchers discovered that sweetened cereals were …………...... .
important nutritionally
all surprisingly heavy in sugar
more expensive than cheese
All equally harmful to teeth