RE3-UNIT4B

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1. Walking on the icy sidewalk without proper shoes can be a serious hazard because you might slip and fall. The word "hazard" most closely means a ______. （）

A. fun and exciting adventure.B. danger or risk of injury.C. boring and uneventful situation.

2. After a week of very hot weather, the temperature dropped to a more moderate and comfortable level for the picnic. If the weather is "moderate," it is ______. （）

A. not extreme; it is mild and average.B. extremely cold and freezing.C. dangerously hot and humid.

3. The massive old tree in the park was so large that twenty children could hold hands and still not reach around its trunk. Something described as "massive" is ______. （）

A. very small and delicate.B. of normal and expected size.C. extremely large and heavy.

4. The weather forecast on the news said it would rain all afternoon, so we decided to have our party indoors instead. A "forecast" is a ______. （）

A. report about what happened yesterday.B. prediction about what the weather will be like in the future.C. description of the stars at night.

5. Scientists use special instruments to detect tiny movements in the Earth's crust to predict earthquakes. To "detect" something means to ______. （）

A. discover or notice its presence.B. hide it so no one can find it.C. cause it to happen on purpose.

6. To be safe during a fire, it is important to have a drill where everyone practices how to leave the building quickly. A "drill" in this context is a ______. （）

A. tool used for making holes in wood.B. boring lecture about rules.C. practice exercise for an emergency.

7. The two new smartphones looked identical; they were the same model, color, and size. If two things are "identical," they are ______. （）

A. completely different from each other.B. exactly the same in every way.C. similar but not quite the same.

8. The science teacher used a simple experiment to demonstrate how volcanoes erupt using baking soda and vinegar. To "demonstrate" something means to ______. （）

A. show how it works through an example or action.B. write a long essay about it.C. forget the important details.

9. Engineers are working to innovate new building designs that can survive powerful earthquakes. To "innovate" means to ______. （）

A. copy old ideas exactly.B. destroy existing structures.C. introduce new methods or ideas.

10. During the strong earthquake, several old buildings suffered a partial collapse of their walls. A "collapse" is when something ______. （）

A. grows taller and stronger.B. falls down or caves in suddenly.C. changes color slowly.

11. The gymnast's body was very flexible, allowing her to bend and twist into amazing shapes. A person who is "flexible" can ______. （）

A. bend or move easily without getting hurt.B. only stand in one stiff position.C. lift very heavy weights.

12. The foundation of a house is the solid concrete base that is built underground to support the entire structure. The "foundation" is the ______. （）

A. decorative roof of a building.B. paint on the outside walls.C. lowest part of a building that holds it up.

13. The severe storm brought heavy rain, strong winds, and caused flooding in many areas. A "severe" storm is one that is ______. （）

A. light and pleasant.B. very serious, harsh, or extreme.C. warm and sunny.

14. The earthquake had a high magnitude, which meant it released a huge amount of energy and caused widespread shaking. The "magnitude" of an earthquake refers to its ______. （）

A. size, strength, or amount of energy released.B. exact location under the ground.C. duration or how long it lasted.

15. The old window frames would rattle loudly every time a strong gust of wind blew against the house. To "rattle" means to ______. （）

A. remain perfectly still and silent.B. become brighter in color.C. make a quick series of short, sharp knocking sounds.

16. The devastating flood destroyed hundreds of homes and left many people without shelter. A "devastating" event is one that causes ______. （）

A. great joy and celebration.B. great damage, destruction, or suffering.C. minor and easily fixed problems.

18.

选词填空（有多余）

moderate, massive, detect, collapse, flexible, magnitude, hazard

Earthquakes remain one of nature's most unpredictable ___. Using advanced technology, scientists can now ___ tiny seismic waves and forecast potential risks hours or even days in advance.
The ___ scale measures an earthquake's energy. A ___ tremor may barely disturb daily life, whereas a severe event with ___ force can cause entire city blocks to ___within seconds.
Understanding these patterns helps communities prepare, build safer structures, and ultimately save lives.

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