Directions: In the following passage, some words have been deleted. Select the most appropriate option to fill in each blank.

___(1)___ the Iran nuclear deal was a campaign promise of U.S. President Joe Biden. In the White House, Mr. Biden ___(2)___ a special envoy for Iran, starting indirect negotiations with the country and direct talks with other signatories of the 2015 agreement to meet this objective. But almost one and a half years later, there has still been no ___(3)___ in one of the most contentious issues he faces in West Asia. Multiple rounds of talks in Vienna made ___(4)___ in bringing the deal back on track, which had sought to scuttle Iran’s nuclear program in return for ___(5)___ international sanctions. But the talks ___(6)___ earlier this year as the Biden administration reportedly refused to remove the terrorist designation of the Islamic Revolutionary Guard Corps (IRGC), a critical arm of Iran’s armed forces. Last week, Qatar, which hosted the U.S.-Taliban talks that led to the February 2020 ___(7)___ between the Afghan Sunni fundamentalist insurgency and the Trump administration, held indirect talks between the U.S. and Iran. However, as Mr. Biden prepares for his first West Asia tour as U.S. President later this month, a deal is still ___(8)___. While Iran says the Doha talks were positive, U.S. officials say the prospects of reviving the agreement are now ___(9)___. That they stay engaged in talks shows that both sides are still ___(10)___ on a solution, but they face structural impediments.