题目内容：

听下面一段较长对话，回答以下小题。

1.What makes the cave uncommon?

A. It is underground,wide and long.    B. Its strange rocks and stream.    C. Both A and B.

2.What makes it impossible to build roads or railways leading to the cave?

A. The local people don’t agree on that.

B. The ground there is not strong enough.

C. The local government can’t afford that much money.

3.Why does food seem to be one problem for the tourists?

A. Some of them don’t like the taste.    B. The food there is too expensive.    C. It’s not convenient to buy food there.

4.What should the tourists bring with them besides food?

A. Guns.    B. Clothes.    C. Tools.