单选题
How big is the universe?
A. It has millions of stars. B. It has 100 billion galaxies.
C. It is unimaginably big. D. It has as many galaxies as the Milky Way.
A. It has millions of stars. B. It has 100 billion galaxies.
C. It is unimaginably big. D. It has as many galaxies as the Milky Way.
【正确答案】
C
【答案解析】文章第一句就提出宇宙大的人类根本无法想象，原句为It is just about impossible to imagine how big the universe is，故选C。
单选题
What would happen to the Earth in a black hole?
A. It would become very tiny and light. B. It would remain the same weight.
C. It would start bending light. D. It would become much heavier.
A. It would become very tiny and light. B. It would remain the same weight.
C. It would start bending light. D. It would become much heavier.
【正确答案】
B
【答案解析】根据第三段…the Each would be reduced to the size of a tennis ball，while remaining as heavy as it is now.可知，如果地球进了黑洞会变成网球那么大，但是重量却不变，故选B。
填空题
Complete the following statements with information given in the passage in a maximum of two words for each blank.
58. The distance covered by light during a year is called______.
58. The distance covered by light during a year is called______.
填空题
The universe started from the Big Bang, a______.
填空题
______ accounts for the largest part of the elements that make up the universe.