[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"exercise-C1-3623":3},{"preview":4,"open":14,"missing":35},{"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":17,"access":18,"updated":19,"previous_id":20,"next_id":21,"previous":22,"next":26,"first":30},3623,85,100,"C1","use_of_english","open_cloze","uoe_open_cloze","The Tipping Point","the-tipping-point",null,"Climate scientists have long warned that the Earth's climate system contains a number of so-called tipping points - thresholds (0) BEYOND which changes become irreversible and self-sustaining. The melting of the Arctic ice sheet, (1) .......... instance, illustrates this phenomenon clearly. As ice melts, it exposes…",[],"login","pro","2026-10-02T14:14:49",3622,3624,{"id":20,"number":23,"title":24,"slug":25},84,"Cities by Design","cities-by-design",{"id":21,"number":27,"title":28,"slug":29},86,"A Dose of Prevention","a-dose-of-prevention",{"id":31,"number":32,"title":33,"slug":34},3539,1,"The Aurora Youth Orchestra","the-aurora-youth-orchestra",false]