136. A number of 许多，大量

136. A number of “许多，大量”
后加名词复数，做主语时谓语动词用复数。
Look, a number of students are playing basketball on the playground, they are very happy.

A number of tourists come to visit the Great Wall every year. Because the Great Wall is famous all over the world.

The number of“…的数量”
加名词复数，做主语时谓语动词用单数。
The number of animals in the zoo is 1000.

The number of students in our school is about 3000.