作业帮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
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
for five years 中文
for score of years
for six years的同义词
for three years同义词求
Wating For You Six Years
A Roadmap for Five Years
for about three years(提问)
Tom has( )for three years
for years 用于什么时态
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