Role-play being a tour guide and a tourist. Tell your partner what to prepare for their trip to the Himalayas, and give reasons.
Example:
A: I'd like to go to the Himalayas next month.
B: OK. I think you must bring a waterproof coat. It's cold and rainy there!
A: Yes. Anything else?
B: You must... and you mustn't ...
Work in pairs. Make a short conversation, following the example in 1.
Now make a list of the things you must bring to the Himalayas. Then add things you mustn't bring.
Read the travel guide entry.