Misi: satu teks akademik pendek

Misi ini memakai satu teks akademik pendek dan lima pertanyaan yang menguji empat hal sekaligus: ide pokok, makna kata dari konteks, satu keterangan tertentu, dan rujukan penunjuk.

Satu pilihan di antaranya sengaja memakai kata yang sama persis dengan teks tetapi bukan jawabannya. Pilihan semacam itu dikenali dengan memeriksa apakah kalimat sumbernya benar-benar menjawab pertanyaan yang diajukan, bukan sekadar memuat kata yang sama.

Teks

Most of the world's liquid fresh water is not in rivers or lakes but underground, in layers of rock and sand called aquifers. Rain that soaks into the ground moves slowly downward until it reaches a layer that holds it. In some aquifers the water travels only a few metres in a year, so water pumped out today may have entered the ground centuries ago. When pumping is faster than this slow refilling, the level of water in the aquifer falls, and wells that once reached it must be dug deeper. The ground itself can also sink, because the water was helping to carry the weight of the rock above it. A dry river bed is visible to everyone, and a falling river is easy to watch; an aquifer gives no such warning. For that reason, the measurement that matters is the depth of water in wells, recorded over many years.