Raxit85
In the recent years, NASA’s Mars Exploration Program has evolved from establishing
whether water on Mars exists and identifying whether rocks on Mars have the right ingredients to host life.
Idiom : from X to Y
"If" is used for conditional statements - if X, then Y
A) whether water on Mars exists and identifying
- "from X and Y" - incorrect
- wrong
B) if on Mars water exists or not and identifying
- "if" used for conditional statements. For statements denoting an optional case - "whether" should be used
- Wrong
C) whether water exists on Mars to identifying
- use of "whether" - correct
- "from X to Y" used correctly
- Correct
D) if water existed on Mars to identifying
- use of "if" - incorrect
- "existed" changes the meaning.
-wrong
E) existence of water on Mars to identification of
- "establishing" is not parallel to "identification"
- "verb-ing of noun" is parallel to "noun"
- wrong
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