Duolingo English Test Practice Test 46

Dozens of small shops selling handmade candles, soap, and pottery line the cobb lane leading to the cathedral. Take the second road on the left, walk past the petrol station, and you will see the libr on your right. Having spent decades studying glaciers, the geologist could tell at a glance which valley had been car by ice. Toward the end of the hike, my legs were so tired that even a gentle slope felt like a moun. Everything considered, the committee found the second proposal more reali and considerably cheaper than the first. Both of the finalists trained in the same modest gym, which makes their rivalry even more fascin to follow.

Every autumn, huge flocks of birds leave their summer homes and travel thousands of kilometres to warmer regions. Some spec, like the Arctic tern, fly from one end of the earth to the other and back again within a single year, rely on the sun, the stars, and the planet's magn field to stay on course. Younger birds making their first jour often follow older, more experi flock members, learning the safest rest points along the way. Climate change is now shif the tim of these journeys, sometimes leaving birds arriving before the food they dep on has appe.

Coral reefs cover less than one percent of the ocean floor, yet they shelter roughly a quarter of all marine species. Their extraordinary productivity rests on a partnership: the coral animal offers shelter, while microscopic algae living inside its tissue provide most of its food through photosynthesis. The algae also give the coral its colour. That arrangement is stable only within a narrow range of conditions. When the water stays a degree or two above its usual summer maximum for several weeks, the algae begin to produce harmful compounds, and the coral responds by expelling them. Select…DeprivedDepressedDeported of its partners, the animal turns white, a condition known as bleaching. A bleached reef is not yet dead; if the temperature falls in time, algae can recolonise the coral and Select…restorerestoredrestoring its colour. But prolonged stress leads to starvation, and dead coral is soon covered by seaweed that is hard to remove. The mass bleaching events recorded in 1998, 2016 and 2020 were unusual in scale, Select…affectingaffectedaffect reefs on every continent with tropical seas. Some researchers are trying to breed heat-tolerant corals, or to move resilient species to sites that are struggling, but these efforts can only buy time. Scientists agree that the Select…fundamentalfundamentallyfoundation problem is warming oceans, which no local measure can reverse.