83. Americans like basenjis because they are　　　　　　 .

A. pleasant

B. Pretty

C. clean

D. quiet

82. What made basenjis so special?

A. They were funny enough to make people laugh.

B. One of them barked at a dog show in London.

C. They were a true friend of man.

D. They were born quiet dogs.

81. Basenjis were first found　　　　　　　　 .

A. in Africa, Europe and America

B. in both Africa and America

C. in central Africa

D. in North Africa

80. The word 　he 　in the last sentence refers to　　　　

A. the captain that got the message

B. the captain that sent the message

C. John

D. Mark

D

The basenji is a central African hunting dog. It comes from a country called Chad, which is north of the Central African Republic. The basenji was well-known as the "silent dog" because for centuries no basenjis had ever been known to bark (吠). Then at a dog show in London in 1953, a basenji actually barked.

As well as being clever,basenjis are known for their natural courage and are still popular hunting dogs in Africa. But in America people keep them mainly because they are gentle and full of fun. The basenji has an unusual habit:it washes itself all over like a cat. It is a middle-sized dog, 16 or 17 inches high from the shoulder. It weighs about 20 pounds. A basenji's coat is short and silky.It may be brown, white, or gold ,or a mixture of these three colours.

79. What made it possible for Mark to be found on the buoy?

A. John told people where to look for him.

B. John radioed to the Good Hope to get him.

C. He shouted when he caught sight of the Good Hope.

D. The captain saw him as the fog cleared.

78. John and Mark became separated because　　　　　　　 .

A. there wasn't room for both John and Mark on the buoy

B. John couldn't control the boat and drifted away

C. Mark thought it safe to stay on the buoy but John didn't

D. John had to stay in the boat to radio for help

77. Mark tried to tie the boat to the buoy so that　　　　　　 .

A. he could spend the night on it while John was looking for help

B. he and John could go sailing again when the fog cleared

C. it wouldn't be hit by other ships

D. he might be picked up by a passing ship

76. Why didn't Mark and Dan go sailing together?

A. Dan asked his brother to go instead.

B. Dan was in some other place.

C. Mark was in some other place.

D. Mark would like to go with John.

75. The writer tells this story to　　　　　　 .

A. show the dangerous side of the astronauts'life

B. show the funny side of the astronauts' life

C. make people laugh

D. make people think

C

One Sunday,Mark decided to go sailing in his boat with his friend Dan , but Dan happened to be away. Dan's brother John offered to go instead though he did not know anything about sailing. Mark agreed and they set out to sea.

Soon they found themselves in a thick fog. Mark was sure they would be hit by a big ship. Fortunately he saw a large buoy (浮标)through the fog and decided to tie the boat to it for safety. As he was getting onto the buoy,however,he dropped the wet rope . The boat moved away in the fog carrying John, who did not know how to use the radio . He drifted (漂流) about and was not seen until twelve hours later.

Mark spent the night on the buoy . In the early morning he fell asleep . He was having a bad dream when a shout woke him up. A ship,the Good Hope, came up and he climbed onto it and thanked the captain. The captain told him that John had been picked up by another ship and the ship's captain had sent out a message. "Without the message I would not have found you on the buoy," he said.

74. Joe didn't want to work　　 with Sam again probably because he thought Sam 　　　　　　　　　.

A. was very slow and possibly deaf

B. didn't know how to operate the door

C. was less experienced than he was

D. didn't know how to do repairs