Up to now, the program ________ thousands of children who would otherwise have died.
- A would save
- B saves
- C had saved
- D has saved
问题
Up to now, the program ________ thousa
参考解析：
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。”up to now是现在完成时态的标志，所以空格处使用现在完成时态。
分类：其他
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