Chọn đáp án và giải thích giúp mình với

1. In an effort... customers with respect, we have changed our hours to accommodate customer needs.

A. Treating B. Has treated C. Treated D. To treat

2. Some crimes seem to be... in this country than in others.

A. Less common enough

B. Much less common

C. The least common

D. Very less common

3. Mr. Barry oversaw the development of the Nissan Building... its initial stages to its completion

A. of

B. to

C. from

D. about

4. The meeting has been put... to Friday as many people have got flu

A. up

B. in

C. out

D. back

5. Tuna,... , may weigh up 1000 pounds

A. is the sea giant

B. can be giants of the sea

C. the sea of the giant

D. one of the sea giants

Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction  in each of the following questions

A mosquito (A) is filled with blood (B) is carrying (C) twice its own body (D) weight

A. is filled

B. is carrying

C. twice

D. weight

1.       We should be firm_______ patient in this case.

          a. and                          b. or                          c. in stead of              d. rather

2.       _______ food we eat lacks minerals, then the body an use the stores from its bones for more urgent needs.

          a. As the                     b. If the                    c. The                         d. Since

3.       It sounds like something wrong with the car's engine_______, we'd better take it to the garage immediately.

          a. Otherwise              b. Without it            c. If not                      d. If so

4.       We didn't go to Paris. We went to Rome_______

          a. also                         b. but also                c. instead                   d. instead of

5.       No one _______ Kathy knows very much about it.

          a. and                          b. as                          c. but                          d. however

6.       Some birds, _______ robins and cardinals, spend their winter in the North.

          a. as                            b. such as                 c. and                          d. likely

7.       Galaxies are composed of millions of individual stars_______ are so far away that they appear as single pints of light.

          a. but they                  b. they                      c. in spite of               d. contrary

8.       Internet is a very fast_______ convenient way for us to get information.

          a. and                          b. or                          c. therefore                d. but

9.       It's raining, _______ I can't go to the beach.

          a. so                            b. or                          c. but                          d. and

10.     An effective paragraph must _______ be unified and ordered but also complete.

          a. in addition             b. either                    c. not only                 d. as well

Read the following passage and mark the letter A, B, C or B on your answer sheet to indicate the correct answer to each of the questions from 30 to 37.

  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 Line 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.

According to the passage, why do ants use different compounds as trail pheromones?

A. To reduce their sensitivity to some chemicals 

B. To attract different types of ants 

C. To protect their trail from other species 

D. To indicate how far away the food is

Read the following passage and mark the letter A, B, C or B on your answer sheet to indicate the correct answer to each of the questions from 30 to 37.

  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 Line 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.

According to the passage, how are ants guided by trail pheromones?

A. They concentrate on the smell of food.

B. They follow an ant who is familiar with the trail 

C. They avoid the vapor spaces by moving in a straight line. 

D. They sense the vapor through their antennae.