Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

Question. My brother graduated from Hong Kong University of Science and Technology last month and ____ for a job since then.

A. has been looking

B. has looked

C. was looking

D. had looked

Complete the second sentence so that it has a similar meaning to the first sentence using the word given. Do not change the word given. You must use between two and five words including the word given.
a) Steve started learning the violin a month ago.
learning
Steve ... has been learning ... the violin for a month.
b) I haven t been to an Indian restaurant for ages.
since
It s ages ................................ an Indian restaurant.
c) When she heard the results Mary began to feel more confident.
become
Since hearing the results ................................ more confident.
d) The last time Nancy came here was in 1986.
since
Nancy hasn t ................................ 1986.
e) This is my first visit to Japan.
time
This is the first ................................ to Japan.
f) How long have Helen and Robert been married?
get
When ................................ married?
g) Jack bought those trousers last month and has been wearing them ever since.
for
Jack has ................................ a month.
h) It s a long time since our last conversation.
spoken
We ................................ long time.
i) Thanks but I had something to eat earlier.
already
Thanks but I ve eat ................................ .
j) This is my first game of water-polo.
played
I ................................ before.

Read the passage and choose the best answer.

A pilot cannot fly by sight alone. In many conditions, such as flying at night and landing in dense fog, a pilot must use radar, an alternative way of navigating. Since human eyes are not very good at determining speeds of approaching objects, radar can show a pilot how fast nearby planes are moving. The basic principle of radar is exemplified by what happens when one shouts in a cave. The echo of the sounds against the walls helps a person determine the size of the cave. With radar, however, the waves are radio waves instead of sound waves. Radio waves travel at the speed of light, about 300,000 kilometers in one second. A radar set sends out a short burst of radio waves. Then it receives the echoes produced when the waves bounce off objects. By determining the time it takes for the echoes to return to the radar set, a trained technician can determine the distance between the radar set and other objects. The word “radar”, in fact, gets its name from the term “radio detection and ranging”. “Ranging” is the term for detection of the distance between an object and the radar set. Besides being of critical importance to pilots, radar is essential for air traffic control, tracking ships at sea, and for tracking weather systems and storms. 

 According to the passage, the distance between a radar set and an object can be determined by _______.  

A. the time it takes for a burst of radio waves to produce echoes when the waves bounce off the object 

B. the term “ranging” used for detection of the distance between an object and the radar set 

C. the time it takes for the radio waves to produce echoes and bounce off the object 

D. the time it takes for the echoes produced by the radio waves to return to the radar set

Read the passage and choose the best answer.

A pilot cannot fly by sight alone. In many conditions, such as flying at night and landing in dense fog, a pilot must use radar, an alternative way of navigating. Since human eyes are not very good at determining speeds of approaching objects, radar can show a pilot how fast nearby planes are moving. The basic principle of radar is exemplified by what happens when one shouts in a cave. The echo of the sounds against the walls helps a person determine the size of the cave. With radar, however, the waves are radio waves instead of sound waves. Radio waves travel at the speed of light, about 300,000 kilometers in one second. A radar set sends out a short burst of radio waves. Then it receives the echoes produced when the waves bounce off objects. By determining the time it takes for the echoes to return to the radar set, a trained technician can determine the distance between the radar set and other objects. The word “radar”, in fact, gets its name from the term “radio detection and ranging”. “Ranging” is the term for detection of the distance between an object and the radar set. Besides being of critical importance to pilots, radar is essential for air traffic control, tracking ships at sea, and for tracking weather systems and storms. 

According to the passage, what can radar detect besides location of objects?  

A. Shape.            

B. Size.                 

C. Speed.              

D. Weight.  

Read the passage and choose the best answer.

A pilot cannot fly by sight alone. In many conditions, such as flying at night and landing in dense fog, a pilot must use radar, an alternative way of navigating. Since human eyes are not very good at determining speeds of approaching objects, radar can show a pilot how fast nearby planes are moving. The basic principle of radar is exemplified by what happens when one shouts in a cave. The echo of the sounds against the walls helps a person determine the size of the cave. With radar, however, the waves are radio waves instead of sound waves. Radio waves travel at the speed of light, about 300,000 kilometers in one second. A radar set sends out a short burst of radio waves. Then it receives the echoes produced when the waves bounce off objects. By determining the time it takes for the echoes to return to the radar set, a trained technician can determine the distance between the radar set and other objects. The word “radar”, in fact, gets its name from the term “radio detection and ranging”. “Ranging” is the term for detection of the distance between an object and the radar set. Besides being of critical importance to pilots, radar is essential for air traffic control, tracking ships at sea, and for tracking weather systems and storms. 

 What is the main topic of this passage?  

A. The nature of radar. 

B. History of radar. 

C. Alternatives to radar.  

D. Types of ranging.

Read the passage and choose the best answer.

A pilot cannot fly by sight alone. In many conditions, such as flying at night and landing in dense fog, a pilot must use radar, an alternative way of navigating. Since human eyes are not very good at determining speeds of approaching objects, radar can show a pilot how fast nearby planes are moving. The basic principle of radar is exemplified by what happens when one shouts in a cave. The echo of the sounds against the walls helps a person determine the size of the cave. With radar, however, the waves are radio waves instead of sound waves. Radio waves travel at the speed of light, about 300,000 kilometers in one second. A radar set sends out a short burst of radio waves. Then it receives the echoes produced when the waves bounce off objects. By determining the time it takes for the echoes to return to the radar set, a trained technician can determine the distance between the radar set and other objects. The word “radar”, in fact, gets its name from the term “radio detection and ranging”. “Ranging” is the term for detection of the distance between an object and the radar set. Besides being of critical importance to pilots, radar is essential for air traffic control, tracking ships at sea, and for tracking weather systems and storms. 

 What might be inferred about radar?  

A. It takes the place of a radio. 

B. It has improved navigational safety. 

C. It was developed from a study of sound waves. 

D. It gave birth to the invention of the airplane.