这个街区有一些很棒的餐厅。

There are ___a ___number ___of excellent restaurants in this neighborhood.

公司收到了一些改进建议。

The company has received ___a ___number ___of suggestions for improvement.

一些学生自愿帮忙组织活动。

___A ___number ___of students volunteered to help organize the event.