IELTS Reading True / False / Not Given: cách làm bài, kèm câu hỏi luyện tập

The Glassmakers of Vellin The village of Vellin has a glassmaking tradition that dates back at least four hundred years. Its early glassmakers were attracted to the area by its forests, which supplied wood to fuel the furnaces, and by a nearby river, which was used to transport finished goods to the coast. By the nineteenth century, most of the surrounding forest had been cut down, and the workshops began burning coal brought in by canal. Today, only two workshops remain, both run by families who have worked with glass for generations. They no longer produce everyday items such as bottles and windows, which are made far more cheaply in large factories, but specialise in decorative pieces sold to collectors and tourists. Each piece is blown and shaped by hand, and a large bowl may take a full day to complete. A small museum in the village displays examples of Vellin glass from different periods, together with tools used by the early glassmakers.

NOT GIVEN. The passage mentions furnaces and fuel but never says what glass is made from or how hot the furnace must be.

1. Not correct. This may be true in real life, but the passage does not say it, and in IELTS only the passage counts.
2. Not correct. FALSE needs something in the passage that contradicts the statement, but sand and heating temperatures are never discussed at all.
3. Correct. Sand and temperature are not mentioned, so the statement cannot be checked against the passage.

Mẹo: Never use your own knowledge. A statement that is true in the real world is still NOT GIVEN if the passage does not say it.