Here are the correct wh-words to complete the sentences:

1. to use the air conditioner?
2. the most valuable appliance in your kitchen?
3. the nearest bus stop?
4. who I should contact to get the lost luggage?
5. when does the embassy open?
6. what I can buy a socket adapter nearby?
7. what I should eat before trekking?
8. how to get to the nearest convenience store?
9. who is asking for further information about the art exhibition?

For the mistakes in part b:

6. Could you tell me when does the embassy opens?
7. Could you tell me what I can buy a socket adapter nearby?
8. Could you tell me what should I eat before trekking?
9. Could you show me how get to the nearest convenience store?
10. Could you show me who is asking for further information about the art exhibition?

For the listening section’s one word fill-ins:

6. **landmarks**
7. **features**
8. **Buses**
9. **following**
10. **important**

For the speaking section:

**D. Call the travel agent.**