Read the following passage 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 on 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 Attatexana 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 word "furnish" is closest in meaning to________.
A. include
B. cover
C. select
D. provide
Giải bởi qa.haylamdo.com
D
"furnish" = “provide”: cung ứng, cung cấp
I first met her two years ago when we ______ at Oxford University.
A ________ problem, feeling, or belief is difficult to change because its causes have been there for a long time.
_________ saying was so important that I asked everyone to stop talking and listen.
In _______ 22nd SEA Games, Vietnam won 158 _______ gold medals.
This book is not really ________. It is a waste of money buying it.
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Much(A) children like to (B)get their(C) faces painted with (D)bright colors at community fairs.
Mark the letter A, B, C or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.
The venom of coral snakes is especially potent and the mortality rate among humans who have been bitten is high.
Mark the letter A, B, C or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.
We’ll have to use the restrooms on the next floor because the ones on this floor are not in working condition.
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that best fits each of the numbered blanks from 35 to 44.
In Korea, in former days the marriage between a man and woman represented the joining of two families, rather (35)_____ the joining of two individuals. The event (36)_____ Taerye (Great Ritual), and people from all over the village or neighborhood participated. The ceremonies and events surrounding the actual marriage were long and (37)_____ . Professional matchmakers paired up likely candidates for marriage, with the new couple often meeting for the first time at their wedding. The families considered many factors in the decision, consulting with fortune tellers for (38)_____ about the couple's future life together. During the Chosun period, people married (39)_____ their early teens, with the girl often being several years older than the boy.
The groom usually traveled to the house of the bride for the ceremony, then stayed there for three days (40)_____ taking his new bride to his family's home. The actual ceremony involved many small rituals, with many bows and symbolic gestures. The (41)_____ were expected to control their emotions and remain somber.
(42)_____ , most modern ceremonies resemble Western marriage ceremonies more than (43)_____ Korean ones. However, many folk villages and museums across the country regularly perform ceremonies to (44)_____ the traditions alive.
Điền vào ô 36
The woman _______ when the police told her that her son had died.
He would still be alive today if he_________ that drug when he was in Spain.
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Some bacteria(A)are extremely harmful(B), but others are regular used(C) in producing foods. (D)
