补全对话 (共5分,每空1分)
从方框内所给的句子中选择恰当的句子完成下面的对话。
A:What can I do for you?
B: 1.
A: How about this one? It's good for teenagers to use.
B: Can I get a discount(打折) if I buy one more?
A:_ 2. If you buy two, you will get a 10% discount.
B: Is there also a discount for students' ID cards?
A: Yes. They're on sale to the students. 3.
B: Wonderful. I'll take two. 4.
A: You can have two for¥80.
B: OK. Here is the money. _ 5.
A: No problem.
A. Of course. B. How much are they? C. May I use my students' ID card? D. I want to buy a dictionary as a gift. E. Could you please pack(包装) them for me? F. Here you are. G. So you can save at least¥5 each. |
You probably don't think about soil often, but the following report may help you learn about science of soil.
What is soil made of?
Soil is made of sediments (沉积物) and humus(腐殖质). Sediment is small pieces of rock broken down over time by rain, ice, and wind. Sediment is often found in water. Humus comes from decayed(腐烂的) plants and animals. It helps give plants a lot of the food they need to grow.
How does soil form?
Over centuries, rock breaks down into very small pieces.
The rock pieces mix with humus.
The humus gets thicker and thicker over time. Soil is formed(形成)l
How are soils different?
Soils can be different colors and have different textures(质感). Texture is how the surface of an object feels. Color and texture are two features(特征) of soil.
Plants and soil
Plants do not grow well in some soils. Sandy soi1 is too dry. It does not hold water. Soil with too much clay is too thick. Most plants grow well in dark, rich garden soil that has different sediments and a lot of humus in it.
The title (标题): 1. | |
The things in soil | Sediment is often found in water. Humus 2. decayed plants and animals. |
The steps of forming | Rock breaks down into very small pieces. The rock pieces mix with humus. The humus gets 3. . |
4. | Soils can be different colors and have different textures. |
The relationship between plants and soil | 5. is good for plants to grow in. |