1 . Many people want to grow their own food in their own backyard, but they don’t know how to start. This article will teach you how to start!

Find out what plants to get. Get plants that can grow in your area, and make sure you plant them at the right time of the year.     1     Usually you should start your garden after the last frost date in the spring t While they’re technically fruits, a good starter plant to grow is tomatoes. You can plant these in a pot or in your garden.

    2     Make sure there is enough space to grow your plants. Use a tiller (犁) and till the whole space you will be gardening. Then pull out any weeds and move any large rocks. Find out how big your plants get and space them accordingly. If your plant needs slightly acidic (酸性的) soil, get an acid metre and make sure the soil has enough acidity.     3     To grow them well, you can buy fertilizer that can add acidity to the soil.

Buy your plants and fertilizers. You can either get seeds or get plant seedlings. Go to your local nursery and see what they have. Get fertilizer as well.     4     This will make your plants grow, better and faster!

Plant your plants in the garden. Use a hand shovel and dig a small hole big enough to put your plant in. Water your plant before you put it in so you can wet the root ball. Sprinkle (撒) in a little bit of fertilizer and put your plant in.     5    

For seeds, stick your finger into the dirt where you want to plant the seed until the dirt reaches the second joint on your finger.

A．Learn how to start a garden.

B．Plan out your garden wisely.

C．Make sure to get the right fertilizer for your plants.

D．Some plants that need acidity are tomatoes and blueberries.

E．You should grow and water them in spring if you want to have a good start.

F．Then surround the plant with dirt and make a small circle around it for water.

G．If you plant them too early or too late, they could freeze and die before you can harvest vegetables.

2 . Environmental conditions experienced by parent plants can influence offspring performance through parental effects induced(感应的) by DNA. The offspring can also be influenced by environmental conditions experienced by their parents via soil legacy(遗产) effects due to changes in the composition of soil.

We conducted a two-phase experiment with five genotypes(基因型) of a clonal plant. In the first phase, we grew parent plants of each genotype under two light conditions and two DNA treatments. We then collected soils and clonal offspring for each genotype from each of these four treatments and measured soil properties. In the second phase, we grew the offspring from each of the four treatments in the four different soils, under the two light conditions.

When grown under environmental light condition and in soil from environmental parents, offspring produced by environmental parents grew larger than offspring produced by shaded parents when the parents were treated with water. This difference was smaller when the parents were treated with 5-7°C, and disappeared when the offspring were grown in soil from shaded parents. The growth difference was also observed when the offspring were grown under shaded condition and in soil from shaded parents. However, this difference was greater when the parents were treated with 5-7°C, and disappeared when the offspring were grown in soil from environmental parents.

Our results show that light condition experienced by parents can influence offspring responses to light through both parental effects and soil legacies. The parental effects were mediated(调节) by changes in DNA and the soil legacies. These impacts may eventually influence the ecological and evolutionary track of clonal plant populations.

1. What is the text mainly about?

A．Environmental conditions are important to offspring performance.

B．Offspring performance can be controlled by DNA and the soil legacies.

C．Environmental conditions experienced by parent plants can influence offspring.

D．Light condition experienced by parents can influence offspring responses to light.

2. How did the researchers get the result?

A．They carried out a survey.

B．They conducted an experiment.

C．They analyzed existing data.

D．They collected information from others.

3. What can we learn from Paragraph 3?

A．Growth difference only happens under environmental light condition.

B．Offspring of environmental parents grow smaller than offspring of shaded parents.

C．No growth difference appears when offspring are grown in soil from shaded parents.

D．Growth difference varies when parents are treated with 5-7°C under different conditions.

4. Where is the text most likely from?

A．A diary.

B．A magazine.

C．A novel.

D．A notebook.

3 . 阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式,并将本题的答案写在答题卡上。

There were other creatures that I didn’t want to get too close to—an eel with its strong sharp teeth, with only its head showing from a hole,     1     (watch) for a tasty fish (or my tasty toe! );and     2     giant clam half buried in some coral waiting for something     3     (swim) in between its thick green lips. Then there were two grey reef sharks, each about one and half meters long, which suddenly     4     (appear) from behind some coral. I told     5     (me) they weren’t dangerous but that didn’t stop me from feeling scared to death for a moment!

The water was quite shallow but     6     the reef ended, there was a steep drop to the sandy ocean floor. It marked a boundary and I thought I was very brave when I swam over the edge of the reef and hung there looking down into the     7     (deep)of the ocean. My heart was beating     8     (wild)—I felt very exposed     9     such deep clear water.

What a wonderful,     10     (limit) world it was down there. And what a tiny spot I was in this enormous world!