— _________students took part in planting trees on March 12 this year.— Yes. It is said that ________ the students is 300.

题型：单选题题类：常考题难易度：普通

— _________students took part in planting trees on March 12 this year.
— Yes. It is said that ________ the students is 300.

A、The number of; a number of B、A number of; the number of C、The number of; the number of D、A number of; a number of