21. How does a snake plant help you？
A. It produces enough oxygen.
B. It gives off a fragrant smell.
C. It keeps the indoor air wet
D. It makes the bedroom prettier.
22. Which of the following can be kept in the sun？
A. A snake plant.
B. A peace lily.
C. A bamboo palm.
D. A red-edged dracaena.
23. What do the four plants have in common？
A. They prefer dry conditions.
B. They do good to kids and pets.
C. They reduce indoor pollution.
D. They're suitable for beginners.
B Nalini Nadkarni didn't play with Barbies as a girl. She was too busy climbing the maple trees in her front yard in Bethesda.