【推荐2】Have you planted a plant? How do you ________ your plant? All plants that grow indoors need these ________ things to grow: room, the right temperature, light and water.

All plants need room to grow. The parts of the plants above ground need space, so leaves (树叶) can ________. Roots (根) also need room to grow.

Different plants need different temperatures. Some like to be warmer, but others may hope to be ________. It is necessary ________ where plants come from so that you can make them feel at home.

Plants that grow indoors like bright light. Plants ________ their energy (能量) from sunlight. Windows facing south or west have the ________ light. So try to put the plants close to the ________ to make full use of light. If they don’t get ________ light, their stems (茎) will be thin and they will lean (倾斜) towards light. If there is not a bright window indoors, try using plant growth lamps.

________ is also important. Without water or with too much water, a plant will die. When the soil (土壤) is a little dry, you should water.

How do you stop a disease from spreading? A helpful ________ is through quarantine(隔离)—the act of separating an infected person from ________ else for a period of time. Most recently, quarantine has been widely used to help stop the spread of COVID-19. However, this method has ________ for thousands of years.

In a history book, it is mentioned that lepers(麻风病人) are kept ________ other parts of society. Similarly, when the Black Death began spreading across Europe in1346, many disease carriers were taken out of the cities and left to either get well or ________. Soon after, quarantine became an official disease prevention method.

In history, quarantine has been introduced again and again to ________ the spread of diseases. In 1793, the US city of Philadelphia tried to stay away from yellow fever ________ quarantining sailors outside the city.

Perhaps the most ________ quarantine example came from a cook. In the early twentieth century, Mary Mallon carried a type of bacteria(细菌) that caused typhoid fever(伤寒). Though Mary never got sick from the ________ herself, officials found over ten patients with typhoid fever had connected with her. They put her in quarantine and made her ________ never to cook for others again. But Mary broke her promise and was put into quarantine again-this time for the rest of her life.