Up to now the program thousands of children who would otherwise have died. A. would save

问题补充：

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

A. would save

B. saves

C. had saved

D. has saved

答案：

A. would save

B. saves

C. had saved

(答案→)D. has saved

解析：句意是：直到现在，这个项目挽救了上千名儿童的命，否则他们就会死掉。这题考查时态，时间是：Up to now“直到现在”所以用现在完成时，选D。