[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"exercise-B1-715":3},{"preview":4,"open":14,"missing":37},{"id":5,"number":6,"total":7,"level":8,"course":9,"activity":10,"discriminator":11,"title":12,"slug":13,"instructions":14,"excerpt":15,"prompts":16,"lock":19,"access":20,"updated":21,"previous_id":22,"next_id":23,"previous":24,"next":28,"first":32},715,61,90,"B1","reading","long_text","reading_long_text","The Great Wall of China","the-great-wall-of-china",null,"The Great Wall of China is one of the most famous landmarks in the world. Built over 2,000 years ago, it stretches more than 21,000 kilometers (13,000 miles) across northern China. The wall was originally constructed to protect Chinese territories from invasions by nomadic groups from the north. Different parts of…",[17,18],"What was the original purpose of the Great Wall of China?","What materials were used to build the wall?","login","pro","2026-10-02T14:14:49",714,716,{"id":22,"number":25,"title":26,"slug":27},60,"The Mystery of the Bermuda Triangle","the-mystery-of-the-bermuda-triangle",{"id":23,"number":29,"title":30,"slug":31},62,"The Moon Landing","the-moon-landing",{"id":33,"number":34,"title":35,"slug":36},655,1,"A Lifetime on Two Wheels","a-lifetime-on-two-wheels",false]