Uptonowtheprogram________thousandsofchildrenwhowo

Up to now, the program ________ thousands of children who would otherwise have died.

A. would save

B. saves

C. had saved

D. has saved

正确答案：D
本题考查动词时态的用法句意应为“截止到现在这个项目已经挽救了成千上万的本来会死去的孩子的生命”uptonow是现在完成时态的标志所以空格处使用现在完成时态