As a good doctor,he ______a lot of people’s lives till now.(save) A has saved B had saved选哪个?为什么?

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As a good doctor,he ______a lot of people’s lives till now.(save) A has saved B had saved选哪个?为什么?

As a good doctor,he ______a lot of people’s lives till now.(save) A has saved B had saved选哪个?为什么?
As a good doctor,he ______a lot of people’s lives till now.(save) A has saved B had saved
选哪个?为什么?

As a good doctor,he ______a lot of people’s lives till now.(save) A has saved B had saved选哪个?为什么?
A
till now 到现在为止,所以用现在完成时

has saved
till now,这段时间,用现在完成式
如果是till yesterday 就用B had saved

A till now,用于现在完成时。
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