Based on the signs shown in the image:

**36. What does the sign (A) say?**
The sign shows "40," which typically indicates a speed limit. Therefore, the best answer is:
**B. You shouldn't exceed this maximum speed.**

**37. What does the sign (B) say?**
The sign indicates a left turn. Therefore, the best answer is:
**A. You can turn left ahead only.**

**38. What does the sign (A) say?**
Since sign (A) is the same as the one described in question 36, the answer is still:
**B. You shouldn't exceed this maximum speed.**