that s exactly what i mean tom you ve

Read the following passage and mark the letter A, B, C, or D on your answer sheet lớn indicate the correct answer lớn each of the questions from 43 lớn 50.

There are two basic types of glaciers, those that flow outward in all directions with little regard for any underlying terrain and those that are confined by terrain lớn a particular path.

The first category of glaciers includes those massive blankets that cover whole continents, appropriately called ice sheets. There must be over 50,000 square kilometers of land covered with ice for the glacier lớn qualify as an ice sheet, when portions of an ice sheet spread out over the ocean, they sườn ice shelves.

About đôi mươi,000 years ago the Cordilleran Ice sheet covered nearly all the mountains in southern Alaska, western Canada, and the western United States. It was about 3 kilometers deep at its thickest point in northern Alberta. Now there are only two sheets left on Earth, those covering Greenland and Antarctica.

Any domelike body toàn thân of ice that also flows out in all directions but covers less kêu ca 50,000 square kilometers is called an ice cap. Although ice caps are rare nowadays, there are a number in northeastern Canada, on Baffin Island, and on the Queen Elizabeth Islands.

The second category of glaciers includes those of a variety of shapes and sizes generally called mountain or alpine glaciers. Mountain glaciers are typically identified by the landform that controls their flow. One sườn of mountain glacier that resembles an ice cap in that it flows outward in several directions is called an ice field. The difference between an ice field and an ice cap is subtle. Essentially, the flow of an ice field is somewhat controlled by surrounding terrain and thus does not have the domelike shape of a cap. There are several ice fields in the Wrangell. St. Elias, and Chugach mountains of Alaska and northern British Columbia.

Less spectacular kêu ca large ice fields are the most common types of mountain glaciers: the cirque and valley glaciers. Cirque glaciers are found in depressions in the surface of the land and have a characteristic circular shape. The ice of valley glaciers, bound by terrain, flows down valleys, curves around their corners, and falls over cliffs.

What does the passage mainly discuss?

A. Where major glaciers are located

B. How glaciers shape the land

C. The different kinds of glaciers

D. How glaciers are formed

Despite the traffic hold-ups, we were able lớn arrive at the airport in the nick of the time just before the check-in counter closed.

B. with all out luggage

C. at the very last moment

D. with much time lớn spare

Read the following passage and mark the letter A, B, C, or D on your answer sheet lớn indicate the correct answer lớn each of the questions from 38 lớn 42.

Insects’ lives are very short and they have many enemies, but they must survive long enough lớn breed and perpetuate their kind. The less insect-like they look, the better their chance of survival. To look "inedible" by imitating plants is a way frequently used by insects lớn survive. Mammals rarely imitate plants, but many fish and invertebrates bởi.

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The stick caterpillar is well named. It is hardly distinguishable from a brown or green twig. This caterpillar is quite common and can be found almost anywhere in North America. It is also called "measuring worm" or "inchworm." It walks by arching its body toàn thân, then stretching out and grasping the branch with its front feet then looping its body toàn thân again lớn bring the hind fed forward, when danger threatens, the stick caterpillar stretches its body toàn thân away from the branch at an angle and remains rigid and still, lượt thích a twig, until the danger has passed.

Walking sticks, or stick insects, bởi not have lớn assume a rigid, twig-like pose lớn find protection: they look lượt thích inedible twigs in any position. There are many kinds of walking sticks, ranging in size from the few inches of the North American variety lớn some tropical species that may be over a foot long, when at rest their front legs are stretched out, heightening their camouflage. Some of the tropical species are adorned with spines or ridges, imitating the thorny bushes or trees in which they live.

Leaves also seem lớn be a favorite object for insects lớn imitate. Many butterflies can suddenly disappear from view by folding their wings and sitting quietly among the plants that they resemble.

What is the main idea of the passage?

A. Caterpillars that live in trees

B. The feeding habits of insects

C. How some insects imitate plants lớn survive

D. Insects that are threatened with extinction

Mark the letter A, B, C, orD on your answer sheet lớn indicate the underlined part that needs correction in each of the following questions.

I visited Mexico and United States last year.

A. visited

B. Mexico

C. United States

D. last year

I think he will join us, _____________?

A. won’t he

B. don’t I

C. will not he

D. bởi not I

Mark the letter A, B, C or D on your answer sheet lớn indicate the correct answer lớn each of the following questions.

When Bill got home page, his children_____________in the yard.

A. will be playing

B. were playing

C. are playing

D. played

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