To solve the directions given in the exercise, let's break down each step based on the provided map:

1. **First instruction**:
- Start at the "start" location.
- Go straight on, turn left, go past the post office, and turn right.
- The second building on the left after this route is **the shop**.

2. **Second instruction**:
- From the start, go straight on, turn right, then turn left into Green Street.
- Go straight on, pass the park, and turn left.
- It's on your right. This leads you to **the hospital**.

3. **Third instruction**:
- Go straight on, turn left, go past the library and you’ll see it on your left.
- This location is **the bookstore**.

4. **Fourth instruction**:
- Go straight on, turn left, and turn right into River Road.
- It’s next to the park at the corner of River Road and High Street. This place is **the supermarket**.

5. **Fifth instruction**:
- Go straight on, turn right, and then left.
- The second building on your left should be **the post office**.

Based on these steps, the missing places in the blanks would be:

1. **the shop**
2. **the hospital**
3. **the bookstore**
4. **the supermarket**
5. **the post office**