For years,doctors____millions of patients' lives with the help of microscopes.A.have saved B.are saving C.will save D.Were saving为什吗选第一个呢
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![For years,doctors____millions of patients' lives with the help of microscopes.A.have saved B.are saving C.will save D.Were saving为什吗选第一个呢](/uploads/image/z/11992388-68-8.jpg?t=For+years%2Cdoctors____millions+of+patients%27+lives+with+the+help+of+microscopes.A.have+saved+B.are+saving+C.will+save+D.Were+saving%E4%B8%BA%E4%BB%80%E5%90%97%E9%80%89%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%91%A2)
For years,doctors____millions of patients' lives with the help of microscopes.A.have saved B.are saving C.will save D.Were saving为什吗选第一个呢
For years,doctors____millions of patients' lives with the help of microscopes.
A.have saved B.are saving C.will save D.Were saving为什吗选第一个呢
For years,doctors____millions of patients' lives with the help of microscopes.A.have saved B.are saving C.will save D.Were saving为什吗选第一个呢
选项是A.
为什么选第一个,因为For years表示从过去算起到现在(还可以继续)“多年”.关于现在完成时的概念,到百度查询一下就清楚了.
选A 。For years现在完成时的标志。
语法问题啊,因为它前面是for years,就是说有了几年... 还有一件事,那个patients' live 应该是patients' life 哦
for two years 是什么意思?
Two years for
for hundreds of years
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for score of years
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Wating For You Six Years
A Roadmap for Five Years
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He died for 3 years .
for years with的意思
For 25years as one
WAIT-FOR-ME-FIVE-YEARS-
for ages=for years么?
for years and years什么意思及同义词求解答