48. Which of the following was a clear signal of alarm?
A. The elephant stopped.
B. A spotted deer called.
C. The elephant seized a branch.
D. The forest was silent for a while.
49. The author begins his account of the tour in the forest mainly by
A. describing various sounds
B. comparing different animals
C. listing different activities
D. introducing various plants
50. What does the underlined part "to sense the aura" most probably mean?
A. To see the diversity.
B. To enjoy the scenery.
C. To feel the atmosphere.
D. To experience the freedom.
51. How does the author feel after several visits to Corbett?
A. Seeing a Bengal tiger is quite thrilling.
B. It is very time-consuming to travel in Corbett.
C. It is really worthwhile to study the animals in Corbett.
D. The process of finding Bengal tigers is most appealing.