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Have you ever observed ants (A) (marching / marched) in and out of their nest? If so, it may have (B) (remind / reminded) you of a highway packed with cars. But this comparison is not appropriate. Ants never get into a traffic jam, no matter how fast they move or how many of them occupy the road. This is because their movements are based on cooperation. When there are a few ants moving in a single direction, some ants are likely to move slow, some fast, and others even faster. As their number increases, however, they communicate with each other so that they all move at the same speed. The slow speed up while the fast and the superfast slow down.
1. What is the best title for the paragraph?
a. Ants : Hard-working Gatherers of Food
b. Ants’ Marching : Amazing Cooperation
c. Life of Ants : Strong Will to Survive
2. According to the paragraph, which is true?
a. A highway packed with cars is similar to the figure of marching ants.
b. Ants can move at the same speed through communication.
c. Ants sometimes get into a traffic jam because some move too slowly.
3. Choose the appropriate one for (A) and (B)
(A) marching : Have you observed ants marching?
(B) reminded : It may have reminded you of a highway.
may have PP : ~했을지도 모른다.
must have PP : ~했음에 틀림없다.
should have PP : ~했어야 했다.
cannot have PP : ~했을 리가 없다.