Part IV Error Correction (15 minutes) Directions: This part consists of a short passage.In this passage, there are altogether 10 mistakes, one in each numbered line. You may have to change a word, add a word or delete a word. Mark out put the corrections in the blanks ;provided. If you change a word, cross it out and write correct word in the corresponding blank. If you add a word, put an insertion mark(A) in the right place and write the missing word in the blank. If you delete a word, cross it out and put a slash () in the blank.
A black hole is an astronomical body whose gravity is so strong that nothing can . It was Newton who first stated that light is composed of particles. TheFrench mathematician Laplace next reasoned That if enough mass was added to a star like 62._______ the sun. the gra\itational force of the star would eventually prevent light particles to 63._______ leaving it: it would therefore"blink out^and become an invisibly black star. 64.__________ More than a century later. Einstein devel-oped the theory of relativity, which he argued that 65.__________ Nothing could move faster than light. This means that black stars must also be black holes too be-cause, 66.__________ if light cannot escape, all other matter will 67.__________ be trapped as well. The surface of a black hole thus acts like a one-way membrane: material may fall into a black hole, but no matter, information and energy can come out. 68.__________ Black holes may be observable during their for- mation or while they are near to other matter. A star may go gravitational collapse at the end of its evolu-69.__________ tion, depending primary on its mass. If the star is 70.__________ not spheric al-perhaps because of it is rotating 71..__________ and flattened at the poles-----then detectable gravitational waves can be given off just before the black hole is formed.
62. was - were 63. to - from 64.invisibly- invisible 65which 前加in 66.also 前to 去掉 67.will - must 68. and - or 69. go- undergo 70.primary-pr imarily 71.of去掉
put the corrections in the blanks ;provided. If you change a word, cross it out and write correct word in the corresponding blank. If you add a word, put an insertion mark(A) in the right place
. It was Newton who first stated that light is composed of particles. TheFrench mathematician Laplace next reasoned That if enough mass was added to a star like 62._______
