Sunshine is our good friend. It shines on the earth and helps plants grow — flowers bloom and trees turn green. It also helps us make vitamin D, which keeps our bones healthy. On cold days, sunshine warms us up nicely. When we stay in the sun, we feel happy and energetic. Let’s enjoy the gentle sunshine and live a healthy life!

1.1. What does sunshine help plants do?

A Stop growing.

B Grow well.

C Lose leaves.

D Turn brown.

解析：选B。B细节理解题。原文核心信息是“helps plants grow”（帮助植物生长），选项B“Grow well”（长得好）与原文含义一致但表达不同，A、C、D均与文意相反。故选B。

2.2. What can sunshine help us make?

A Vitamin A.

B Healthy bones.

C Vitamin D.

D Fresh air.

解析：选C。C细节理解题。原文提到“helps us make vitamin D”（帮助我们合成维生素D），选项C直接对应核心信息，题干“make”与原文一致，其他选项中B是维生素D的作用而非阳光直接合成的物质，A、D未提及 。故选C。

3.3. How does sunshine help us on cold days?

A Make us cold.

B Warm us.

C Make us wet.

D Hide us.

解析：选B。B细节理解题。原文“warms us up nicely”（很好地温暖我们），与B项相同。A与文意相反，C、D无依据。故选B。

4.4. How do we feel when we stay in the sun?

A Tired.

B Happy.

C Angry.

D Sleepy.

解析：选B。B细节理解题。原文“feel happy and energetic”（感到快乐且精力充沛），选项B“Happy and active”（快乐且活跃）含义一致但表达不同，A、C、D均与原文情绪相反。故选B。