托福考满分阅读练习

Question 10 of 10
Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.
Drag your answer choices to the spaces where they belong. To remove an answer choice, click on it.To review the passage, click VIEW TEXT.
Photographic evidence suggests that liquid water once existed on the surface of Mars.

Answer Choices

  • A. Mars' runoff and outflow channels are large-scale, distinctive features that suggest that large quantities of liquid water once flowed on Mars.

  • B. Although some researchers claim that Mars may once have had oceans, others dispute this, pointing to an absence of evidence or offering alternative interpretations of evidence.

  • C. Various types of images have been used to demonstrate that most of Martian surface contains evidence of flowing water.

选项拖拽困难时，可以试试缩放屏幕，或者拖拽时使用鼠标滚轮调整屏幕哦

  • D. The runoff and outflow channels of Mars apparently carried a higher volume of water and formed more extensive networks than do Earth's river systems.

  • E. There is very little evidence of liquid water on Mars today, and it is assumed that all the water that once existed on the planet is frozen beneath its surface.

  • F. While numerous gullies have been discovered on Mars since 2000, many astronomers dismiss them as evidence that Mars once had liquid water.

选项拖拽困难时，可以试试缩放屏幕，或者拖拽时使用鼠标滚轮调整屏幕哦

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