Here are the best choices for the blanks based on the context:

**Question 37**: The best option is **B. Besides, I also tried to follow a healthy diet**. This introduces the balanced life concept nicely.

**Question 38**: The best option is **C. This helped me concentrate my efforts on my most important tasks**. It fits well with the time management context.

**Question 39**: The best option is **A. so they would offer me additional support**. This makes sense in the context of communication with family, friends, and teachers.

**Question 40**: The best option is **D. in order to reduce stress and anxiety**. This aligns with the focus on health and well-being.

So the final choices are:
- 37: B
- 38: C
- 39: A
- 40: D