Tibet is among the most popular places for Chinese tourists. The number of travelers to Tibet has grown by 10% every year for a few years. Since July 1,2006, when the first train ran 1956 kilometers from Xining to Lhasa, more and more people have been going to Tibet.
The train stops at several famous places along the way, such as Qinghai Lake, Kunlun Mountain, and the Potala Palace. Passengers can also enjoy many activities during the journey, like Tibetan dancing and Karaoke.
On the train, passengers can have tea, eggs and noodles for breakfast, and fried chicken and green vegetables for lunch and dinner. Unlike most Chinese trains which have open – hole toilets, this one has special toilets which can collect the waste. There is also a special rubbish system (系统) in the train that keeps the environment clean. All the windows on the train can protect people from the bright sunlight. TV and electrical sockets (插座) for computers and mobile phones can be found on the train.
Because there isn’t much oxygen there, trains will have oxygen masks (氧气罩) for those who need them. It makes passengers feel more comfortable when they have enough oxygen on the famous “roof of the world”. There are also doctors on the train to make sure that all of the travelers are safe.
【小题1】Which of the following is NOT among the places of interest?

Have you ever seen a horse with toes? Millions of years ago, horses had many toes. They had four toes on each front foot. They had three toes on each back foot. The horses were smaller than cats.
These small horses lived in the forest. Their many toes helped the horses run over the soft wet ground.
It was very hot in the forest. But the weather changed. It became cold. Many trees couldn’t live in cold weather. The trees died and fell. Forests became open field. The sun made the ground dry and hard. Horses began to change too. They began to get bigger. This took a long time. On the dry hard land, horses needed only their middle toes for running. At last their middle toes became hard.
【小题1】Long ago, the horse had four toes on each of its __________.

Have you ever seen a horse with toes (脚趾)? Millions of years ago, horses had many toes.They had four toes on each front foot.They had three toes on each back foot.The horses were smaller than cats.

These small horses lived in the forest.Their many toes helped the horses run over the soft wet ground.

It was very hot in the forest.But the weather changed.It became cold.Many trees couldn’t live in cold weather.The trees died and fell.Forest became open field.The sun made the ground dry and hard (坚硬).Horses began to change too.They began to get bigger.This took a long time.On the dry hard land, horses needed only their middle toes for running.At last their middle toes became hard.

1.Long ago, the horse had four toes on each of its __________.

A．back feet          B．front feet          C．right feet          D．left feet

2.The cats were __________ the horses at that time.

A．as big as          B．smaller than        C．bigger than        D．as small as

3.When the weather changed, __________.

A．many trees grew well in cold weather        B．animals began to change too

C．cats were older than the horses            D．horses were the same as they are