Question

Since Project Hope started，it _______ millions of children to come back to school
A．has helped     B．helped          C．is helping

Answer 1

A

试题分析：句意：自从希望工程开始以来，它帮助了上百万的孩子回到了学校上课。since后接时间点时，句子的谓语动词用现在完成时，而且须是延续性动词。故选A。