A. they are often in groups

B. their claws are sharp

C. they run faster than all the other animals

D. they run slowly

52. The cheetahs can keep at their speed for __________.

A. a long time

B. a short time

C. as long as they want to

D. as long as the prey is running

53. The cheetahs chase their prey for an average length of ________.

A. one minute

B. more than one minute

C. less than one minute

D. two mintues

54. Cheetahs are messy eaters because __________.

A. they strangle their prays

B. their claws are blunt

C. there is often blood on their face after eating

D. they always lick each other

55. Cheetahs live __________.

A. in the desert

B. in the countryside

C. on the grassy plains

D. in the fields

Comprehension OE (14 marks)

Read the passage carefully and answer the questions that follow.

Some houses were on fire. Several fire-engines raced to the scene. The firemen set up their equipment very quickly and fought the fiercely burning fire. As it was windy， the flames soon spread to the nearby houses. Within a short time， the thick black smoke rose and covered the neighbourhood and darkened the sky. The bright blaze was frightenig. Children screamed. The adults moved them hurriedly to safety. When the fire was put out， the houses had been completely destroyed. The firemen looked through the remains to ensure that nobody had been killed by the fire. Finally， they sprayed the entire area with water.