MCQOPTIONS
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| 1. |
NASA's Opportunity rover has completed ________ years of its touchdown on the surface of Mars as on 25 January 2019. |
| A. | 12 |
| B. | 13 |
| C. | 14 |
| D. | 15 |
| E. | 16 |
| Answer» E. 16 | |