Fill in the missing words.
{"id":21828,"questions":[{"type":"fill-in-blanks","id":"231","dataJson":{"prompt":"Fill in the missing words.","options":{"cracks":[{"key":"seams","label":"seams","value":"seams"},{"key":"cracks","label":"cracks","value":"cracks"}],"expands":[{"key":"shrinks","label":"shrinks","value":"shrinks"},{"key":"expands","label":"expands","value":"expands"}],"expansion":[{"key":"expansion","label":"expansion","value":"expansion"},{"key":"recedes","label":"recedes","value":"recedes"}]},"feedback":"","template":"When water seeps into the cracks in rocks and the temperature drops below freezing, the water {{expands}} as ice in the cracks. The {{expansion}} exerts tremendous pressure on the surrounding rock and acts like a wedge, making the {{cracks}} wider. After repeated freezing and thawing of water, the rock breaks apart.","question_type":1,"validResponse":{"cracks":"cracks","expands":"expands","expansion":"expansion"},"fileboyImageId":""}}]}
Fill in the missing words.
Select the missing words in the text.