阅读下列短文, 从每题所给的A、B、C、D 四个选项中选出最佳选项。
A
Now it's the perfect time to teach kids about growing things. Try one or more of these plant experiments for fun and learning.
Color carnations (康乃馨).
Fill a glass with water and color the water. Add a white carnation stalk( 茎 ) and watch the plant become colorful as it “drinks” the colored water. This is a great, short experiment to show how plants absorb water.
Plant root vegetables.
Find out how root vegetables form underground by planting root vegetables in a clear container. First, fill the bottom of the container with small stones. Next, add potting soil and plant root vegetable seeds, trying carrots or onions, evenly. Keep the soil wet and enjoy watching the root form. Best of all, when the vegetable is done growing, you can eat it!
Study speedy sunflowers.
Sunflower seeds sprout(发芽)and grow quickly, making this the perfect flower for impatient children. These seeds can be started just about anywhere, even in a paper coffee cup or yogurt container. Kids love seeing the plant push its way out of the soil, wearing the seed's outer part like a hat! Move your plant to a flower pot after it sprouts to observe the flower as it forms.
Make a grass basket.
Grass is another seed that grows quickly, Make a living basket by lining a basket with plastic and filling it with potting soil, Put grass seeds on top and water them lightly every day.
Growing plants is a great way to bring some learning —and a little sunshine —to your daily life. Try any of these inexpensive garden experiments for a fun project this spring.
21. Which garden experiment will you choose to see how plants take in water?
A. Color carnations.
B. Make a grass basket.
C. Plant root vegetables.
D. Study speedy sunflowers.
22. What is special about the experiment of “plant root vegetables”?
A. It has strict requirements for temperature.
B. It offers you the tasty fruits of your labor.
C. It is perfect for impatient kids.
D. It is convenient to carry on.
23. What do sunflowers and grass have in common?
A. They both need little water.
B. They both like shade.
C. They both grow very quickly.
D. They both prefer clear containers.
