题目内容：

听下面一段独白，回答以下小题。

1.Who is Pierre?

A. A doctor from Senegal.

B. A university researcher.

C. A United Nations official.

2.What does Pierre mainly talk about?

A. Food supplies in the world.

B. The role that the UN plays.

C. The purpose of his study.

3.What is the expected outcome of Pierre's work?

A. A new medicine.    B. A new type of rice.    C. A new farming method.