1 . 听下面一段较长对话，回答以下小题。
1. How far did the man walk every day in the mountains in Nepal?

A．About 10 km.

B．About 15 km.

C．About 20 km.

2. Why did the man feel discouraged?

A．He was poor at climbing up and down.

B．He had difficulty breathing sometimes.

C．He was often left behind by others.

3. What did the man rarely eat during the trip?

A．Meat.

B．Rice.

C．Vegetables.

4. What did the man enjoy most about the trip?

A．Taking pictures.

B．Sitting in the sun.

C．Walking in the countryside.

2 . 听下面一段较长对话，回答以下小题。
1. What's the percentage of travelers only considering jet lag “an unpleasant thing”?

A．Only one third.

B．Almost a half.

C．Over three quarters.

2. What problem caused by jet lag is NOT mentioned?

A．Headache.

B．Exhaustion.

C．Sleep disorder.

3. How many time zones which you cross might make jet lag a real problem?

A．Only one.

B．Two.

C．Over three.

4. Which flying trip might cause more problems according to the talk?

A．From Shanghai to Beijing.

B．From Los Angeles to New York.

C．From New York to Los Angeles.