Fill in the gaps.
{"id":22158,"questions":[{"type":"fill-in-blanks","id":"339","dataJson":{"prompt":"Fill in the gaps. ","options":{"7":[{"key":"7","label":"7","value":"7"},{"key":"10","label":"10","value":"10"},{"key":"500,000","label":"500,000","value":"500,000"},{"key":"emission","label":"emission","value":"emission"}],"10":[{"key":"7","label":"7","value":"7"},{"key":"10","label":"10","value":"10"},{"key":"500,000","label":"500,000","value":"500,000"},{"key":"emission","label":"emission","value":"emission"}],"500,000":[{"key":"7","label":"7","value":"7"},{"key":"10","label":"10","value":"10"},{"key":"500,000","label":"500,000","value":"500,000"},{"key":"emission","label":"emission","value":"emission"}],"emission":[{"key":"7","label":"7","value":"7"},{"key":"10","label":"10","value":"10"},{"key":"500,000","label":"500,000","value":"500,000"},{"key":"emission","label":"emission","value":"emission"}]},"feedback":"","template":"More than 1 in {{10}} cars sold in 2020 and nearly 1 in {{7}} so far in 2021 were electric or hybrid. There are now over {{500,000}} zero and ultra-low emission vehicles on UK roads. The market for more affordable zero {{emission}} cars is growing rapidly, with a more than 60% increase in cars priced under £35,000 since 2019.","question_type":1,"validResponse":{"7":"7","10":"10","500,000":"500,000","emission":"emission"},"fileboyImageId":""}}]}
Fill in the gaps.
Select the missing words in the text.