A. Passages. Read the following passages carefully. Select the response to the comprehension questions which most accurately agrees with what you have read.
Passage 1
The potato, like other root crops, has an unearned reputation in some countries as an inferior food, or a poor person's staple. While roots are the main ingredient of the diet of half a million people, the potato's nutritive content of protein, fiber, minerals, and vitamins Bl, B2 and C hardly makes it inferior. Medical researchers report that potatoes are even better than milk for malnourished children, who often cannot digest milk. Potatoes provide a high-quality protein similar to that in dairy products. Unfortunately, the potato is still out of reach of a poor person's budget in many developing countries such as Indonesia and the Philippines.
26. According to this passage, why might potatoes be better than milk for children who are improperly nourished?
A. Potatoes contain quite a bit of calcium.
C. These children often cannot assimilate milk
B. Potatoes have more B vitamins than milk.
D. These children often cannot find a supply.
27. The potato ____________.
A. does not deserve its bad reputation
B. is the main food for half a million people
C. is not available in many developing countries
D. can hardly be called nutritious
Passage 2
"Anting" is a noun that is entering the language because of ornithologists, or bird watchers. Anting refers to an activity in which birds rub themselves with defence fluids or, sometimes, other bodily fluids of ants. In the past scientists thought anting had no function and that it was a vice like smoking or drinking. However, most ornithologists now think that birds use ant fluids to kill parasites. Among those ants that birds favour are the Azteca ants, which produce formic acid, a repellent so effective that it will drive off army ants. Birds often crash dive into Azteca nests and allow the insects to crawl all over their bodies, or