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。