WHICH OF THE FOLLOWING IS PROBABLY THE BEST TITLE OF THE PASSAGE

Câu 40 (TH): Which of the following is probably the best title of the passage?

A. Employment Opportunities and Prospects in Germany

B. Dual Vocational Training System in Germany

C. Combination of Theory and Practice in Studying in Germany

D. Higher Education System in Germany

Read the following passage and choose the best answer for each blank from 41 to 45.

Going Inside Black Holes

One of the strangest phenomena in the universe is the black hole. For years, (41) ________ have

studied black holes in an attempt to better understand how they function. Like vacuum cleaners, black

holes will suck up anything (42) ________ crosses their path. The incredible sucking power that black

holes generate comes from gravity. They can quickly swallow up anything including planets, space

debris, and anything else imaginable. Even light cannot escape the (43) ________ of black holes. Since

they are able to pull in light, black holes are nearly impossible to see even with high-powered

telescopes. (44) ________, scientists are able to detect the presence of black holes in space because of

their effect on an observed area.

Black holes can originate in a few ways. One type of black holes occurs when a star comes to the

end of its lifecycle and it dies in a supernova explosion. They can also occur when the mass of a

neutron star becomes so (45) ________ that it collapses in on itself. Black holes may also occur when

several large and dense stars collide with one another in space.