阅读表达。
My friend and I took a camp trip in July. We traveled for four weeks and visited the United States and part of Canada. We camped because it cost less money than staying in hotels.
We planned carefully one week before the trip. First, the car we drove was very small, so we only took two small bags and a few camping things. We took some medicine to prevent insects(昆虫). We also took some food. Then we can cook ourselves. Second, there was a lot to see in the United States and Canada, so it took us a long time to plan the route(路线).
We started our trip on July 2nd. We climbed the mountains, visited famous caves（著名的岩洞）and swam in cool rivers. We visited many places and talked to many people. We learned a lot during our trip. We had an exciting trip.
1. How long did the writer travel?

2. Why did the writer decide to camp during the trip ?

3. How did the writer travel?

4. Did the writer take many things for the trip?

5. When did the writer start his trip?

1. For four weeks.
2. Because it cost less money.
3. By car/He drove a car.
4. No, he didn't.
5. On July 2nd.