Saturday，March 24th We have arrived in the hot, wet city of Bangkok.

We have arrived in the hot and humid city of Bangkok. This is our first trip to Thailand. Different smells make us want to try food. Let's get something to eat, especially for dinner tonight. It is cheap and clean for us to stay in this hotel. We plan to stay here for a few days, visit some local cities, and then go to the north of Chiang Mai.

Tuesday March 27th

Bangkok is beautiful and amazing! Interesting place. We visited the famous water market and saw a lot of fruits and vegetables. Everything is so colorful, we have taken hundreds of photos! Later today, we will go to Chiang Mai. We will go to the north by train, stay in Chiang Mai for two days, and then take a bus to Chiang Rai.

Friday, March 3th

The trip to Chiang Rai is long and boring. We visited a small village in the mountains. People in the village like a quiet life-no computers or mobile phones. They are the kindest people I have ever met. They always say "hello" with a smile. Cathy and I can only speak a few words of Thai, so smiling is the best way to show our kindness. I feel good here and hope to come back next year.

the author of the above diary was in Thailand for ___B___ days.

A. 3 B. 7 C. 15 D. 3

He can't go to Thailand once on March 24th, once on March 27th and once again on March 3th!