شرکت در آزمون آنلاین زبان انگلیسی 1 - زبان انگلیسی 1 | آزمون شماره 14176

Every one may find an ordinary job some day, but if you want to have a ......... one, you need to work hard.

.Try to increase your attention .................... and extend the length of time over which you can work effectively

My mother’s birthday is tomorrow. I … her a suitable present.

 This is an important question, and one that is difficult for scientists to understand. After all, the creation of our Solar System took place billions of years when there were no people around to witness it. Our own evolution is tied closely to the evolution of the Solar System. Thus, without understanding where the Solar System came from, it is difficult to comprehend how mankind came to be.

    Scientists believe that the Solar System evolved from a giant cloud of dust and gas. They believe that this dust and gas began to collapse under the weight of its own gravity. As it did so, the matter contained within this cloud began moving in a giant circle, much like the water in a drain moving around the center of the drain in a circle.

    At the center of this spinning cloud, a small star began to form. This star grew larger and larger as it collected more and more of the dust and gas that collapsed into it.

    Further away from the center of this mass where the star was forming, there were smaller clumps of dust and gas that were also collapsing. The star in the center eventually ignited forming our Sun, while the smaller clumps became the planets, minor planets, moons, comets, and asteroids.

The passage tries to answer which of the following questions?