1.the train arrived at e______ 8 o'clock.

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1.the train arrived at e______ 8 o'clock.
这边的标准答案是exactly,我觉得应该是exact才对啊修饰名词不是要用形容词吗?
2.there is a growing ______ among the public about the safety of taking a plane.
A.concern B.worry C.need D.smell
这个为什么选的是A,这个句子该怎么理解
3.please drop the c____ to keep the bright light from coming through the window.
这里标准答案是curtain,但我个人觉得应该是curtains才对啊,窗帘不是可数的啊,为什么不用curtains
curtain是可数的名词，不是不可数的～

1
exactly不是用来修饰名词的,是用副词做状语修饰“到达”这个动作的
2
concern 关心
3
不可数.就是这么用的~

Betty arrived ()train station at eight o' clock and arrived（我们10点准时到火车站 ()() 10 o'clock ,we arrived at the train shop the train arrived on time at 5 o'clock 这么说对不对on time 和at 5 o the train-------- at 11o'clock. He arrived at the airport at 9 o'clock, By the time he arrived at the stop, the 8 o'clock bus_______ --It was 3'o clock ( )we arrived at the village. “At the time of the crime,I was on the 8 o’clock train to Lo The train arrived at______(exact)eight o'clock.It was neithe He didn't catch the train that leaves at 8 o'clock.为什么是leave the n_____ train to Bingjing is at 8 o'clock.按首字母填空 the train arriving at 8 o'clock is from London这句话怎么理解,