Read the following text and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions
Many ants forage across the countryside in large numbers and undertake mass migrations; these activities proceed because one ant lays a trail on the ground for the others to follow. As a worker ant returns home after finding a source of food, it marks the route by intermittently touching its stinger to the ground and depositing a tiny amount of trail pheromone – a mixture of chemicals that delivers diverse messages as the context changes. These trails incorporate no directional information and may be followed by other ants in either direction.
Unlike some other messages, such as the one arising from a dead ant, a food trail has to be kept secret from members of other species. It is not surprising then that ant species use a wide variety of compounds as trail pheromones. Ants can be extremely sensitive to these signals. Investigators working with the trail pheromone of the leafcutter ant Atta texana calculated that one milligram of this substance would suffice to lead a column of ants three times around Earth.
The vapor of the evaporating pheromone over the trail guides an ant along the way, and the ant detects this signal with receptors in its antennae. A trail pheromone will evaporate to furnish the highest concentration of vapor right over the trail, in what is called a vapor space. In following the trail, the ant moves to the right and left, oscillating from side to side across the line of the trail itself, bringing first one and then the other antenna into the vapor space. As the ant moves to the right, its left antenna arrives in the vapor space.
The signal it receives causes it to swing to the left, and the ant then pursues this new course until its right antenna reaches the vapor space. It then swings back to the right, and so weaves back and forth down the trail.
The phrase “the one” in paragraph 2 refers to a single




A.message
B.food trail
C.dead ant
D.species

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions
The leader failed to explain the cause of the problem. He did not offer any solutions.




A.Though the leader failed to explain the cause of the problem, he did not offer any solutions.
B.The leader failed to explain the cause of the problem so he did not offer any solutions.
C.The leader failed to explain the cause of the problem nor did he offer any solutions.
D.The leader failed to explain the cause of the problem because he did not offer any solutions.

________(42)




A.lack
B.shortage
C.failure
D.need

Which of the following is closest in meaning to the word “flawed”?




A.Offensive
B.Logical
C.Deceptive
D.Faulty

Birds make nests in trees_______ hide their young in the leaves and branches.




A.can where they
B.where can they
C.where they can
D.where can them

An international menu _____ a variety of food can attract most of the tourists.




A.offered
B.offering
C.which offer
D.is offered

She said she had a headache. Otherwise, she ______ in the dance.




A.joined
B.had joined
C.would join
D.would have joined

We can’t deny that all of us made certain mistakes early on.




A.It can be denied that not all of us made mistakes early on.
B.We admit that we could avoid making certain mistakes when young.
C.Nobody of us denies that we made certain mistakes early on.
D.It is true that nobody could avoid making mistakes early on.

(49)




A.means
B.approach
C.route
D.way

Mark the letter A, B, C or D on your answer sheet to indicate the word from the rest in the position of the main stress in each of the following questions.




A.enter
B.supply
C.allow
D.begin