In this section, there is one passage followed by a summary. Read the passage carefully and complete the summary below by choosing no more than three words from the passage. Remember to write the answers on the Answer Sheet. The deathwatch beetle is thought of as the devil’s pest in churches and old houses, but in natural habitats it infests a wide range of decaying hardwoods. It has been found in hornbeam, sweet chestnut, hawthorn, beech, ash, blackpoplar, elm, larch, spruce and yew, but the two most commonly infested species in Britain are oak and willow. In buildings, oak timbers are usually the focus of attack by the beetle, but alder, walnut, elm, larch and Scots pine can be affected too. Deathwatch beetles attack wood that has been decayed by fungi, so it is the damp-prone parts of timbers, at the ends and near leaking gutters and enclosed spaces that are normally attacked first. Adult beetles emerge from holes in the timber in spring, or occasionally in autumn. They breed once and a week or two later the females lay eggs, usually about fifty, in small cracks on the surface of the wood. Adults depend on stored reserves; they do not feed, so the adult lifespan is largely determined by body size and metabolic demands. Emergent females rarely live for more than ten weeks, and males eight or nine weeks, at a temperature of about 20℃. The eggs hatch after two to five weeks and the larvae then wander across the wood to find suitable entry points through which to bore into the timber. Then they take between two and ten weeks to complete their development. The larvae pupate in late summer to early autumn, each individual having constructed a pupal cell just below the surface of the wood. After two or three weeks, the immature beetle emerges from the pupal skin, but then remains torpid inside the chamber until the following spring or early summer. The mature beetle then cuts a perfectly round hole, three to five millimetres in diameter, and emerges covered in a fine layer of wood powder. SUMMARY: The deathwatch beetle is found most often in1trees in Britain. They infest damp-prone timber which has been affected2Adults do not feed, so they survive on3and live for only two or three months. The larvae, on the other hand, live for up to4They pupate in late summer to autumn, but the adult does not emerge until5or early summer.
正确答案:
1.oak and willow 第一段提到蛀虫会出没于很多种腐朽的硬木,但the two most commonly infested species in Britain are oak and willow,由此可得答案。deathwatch beetle蛀虫。oak and willow橡树和柳树。 2.by fungi 见第一段最后一句。fungi真菌。 3.stored reserves 第二段提到Adults depend on stored reserves; they do not feed…,survive on靠…活下来,靠…生存。 4.ten weeks 根据最后一段第二句可知,幼虫需要2至10周的时间来发育。 5.the following spring 最后一段倒数第二句提到幼虫脱掉蛹壳后会继续蛰伏在壳中直到明年春天或初夏才出来。pupate化蛹。