完形填空

We all need to have food every day and food is colorful.

Some food is green, some food is red, and 1 is black. Now more and more people like to have 2 food—black rice, black beans, black grapes. 3 do they like black food? Do you know?

First, black food 4 make grey hair turn into (转变成) black hair. Second, black food is 5 for the heart (心脏). Next, black food can 6 children become clever. At the 7 time, black food can also help women look young.

Doctors 8 that it isn't good to be choosy (挑剔的) about food. Black food is very good, 9 we need food with different colors. So let's eat food in all 10 from now on.