In this task, you will be shown a passage. You need to write a fill-in-the-gap question based on your understanding of the events that might be inferred from the passage. Your question should be answerable based on the passage and only have one correct answer. Show the gap in your question with a _ .

Q: (CNN) -- X-ray data from NASA's MESSENGER probe points to high levels of magnesium and sulfur on the surface of the planet Mercury, suggesting its makeup is far different from that of other planets, scientists say. The unmanned orbiter has been beaming back data from the first planet for a year and a half. Readings from its X-ray spectrometer point to a planet whose northern volcanic plains formed through upwellings of rocks more exotic than those often found on the Earth, the Moon or Mars, said Shoshana Weider, a researcher at the Carnegie Institution of Washington. "Before this MESSENGER mission, a lot of people assumed it was very like the Moon -- it's dark, it's grey," Weider said. But while the Moon's surface formed when light materials floated to the top of an ocean of molten rock, the low level of calcium on Mercury indicates that didn't happen there.NASA probe gives insight into Mercury's formationThe surface has sulfur levels 10 times higher than Earth'sThe MESSENGER orbiter has been circling Mercury since March 2011

A: It's about 5% the size of _ and revolves around the sun every 88 days.
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Q: Washington (CNN) Ted Cruz, looking to take a hard line in South Carolina to win the support of military voters, lashed out Tuesday at what he called a culture of political correctness in the Pentagon. "That's why the last thing any commander should need to worry about is the grades he is getting from some plush-bottomed Pentagon bureaucrat for political correctness or social experiments -- or providing gluten-free MREs," Cruz said, using the shorthand term for Meal, Ready-to-Eat. In a speech aboard the USS Yorktown, which is stationed in Mount Pleasant, South Carolina, Cruz laid out a Reagan-style military policy that he promised would return America to a global position of strength in a speech.Seeking support from South Carolina's military voters, Ted Cruz promised that he would fight political correctness at the PentagonCruz spoke from the USS Yorktown in Mount Pleasant, SC, just a few days before Republicans vote in South Carolina

A: Marco Rubio has accused _ of lying about his record -- the same charge leveled by Donald Trump against Cruz.
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Q: (CNN) North Korea fired a missile on Thursday morning that appears to have failed, according to the US and South Korean militaries. It was the country's second failed missile launch in a week and fifth time they attempted launches in the past two months -- three ballistic missiles were fired in September towards the Sea of Japan, also known as the East Sea. The US Strategic command said it detected the new missile, which may have been a Musudan intermediate-range projectile, at 6:00 p.m. ET Wednesday, or around 6:30 a.m. Pyongyang time Thursday. The South Korea Joint Chiefs of Staff said in a statement the launch took place near Banghyon Airport in Kusong City.Missile believed to be a Musudan intermediate-range missileSecond missile failed launch detected in one week

A:
The rogue state has often favored the _ missile in test launches.
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