scientists didn't know much about lung cancer——.A before long B until recently C long before D in the past few years
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scientists didn't know much about lung cancer——.
A before long B until recently C long before D in the past few years
C long before 很久以前
A before long 不久后,肯定错了.
B until recently 直到最近,是和现在有关,不能用过去时didn't
D in the past few years 最近几年,理由同上.
C long before很久以前
句意:科学家们在很久以前对于肺癌知道得不多。
B 直到最近科学家才对肺癌有较多的了解
D
C long before 过去的时间
祝学习进步!
B until recentlyuntil recently修饰"scientists didn't know much about lung cancer"这个状态,这个状态到recently(最近)终止。
A 不久;B 直到最近 ;C 很久以前;D 在过去的几年里,根据意思,应该选B ,指的是科学家们直到最近才对肺癌有更多的了解。
选择c a是不久以后显然不对,B知道近期 C很久以前 D在过去的几年
B 固定用法 not ... until 直到。。。才。。。意思是科学家们直到最近才对肺癌有更多的了解。
1t等于多少kn
didn't
scientists didn't know much about lung cancer——.A before long B until recently C long before D in the past few years
Scientists didn’t know much about lung cancer _____.1.before long 2.until recently 3.long before 4.in the past few years
Scientists didn’t know much about lung cancer _____.1.before long 2.until recently 3.long before 4.in the past few years
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换算题1t=?KN
1t=?kn 谢谢 急用
didn't went还是didn't go
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i didn't want
didn't的过去式
I didn’t know
why didn't
i didn't see
didn't什么意思?
didn't什么意思