高中英语（连词）1.You'll pass the exam __C__you study with a strong will.A. unless B.until C.as long as D.as well asC项作何解释2.It was about 600 years ago__A__the first clock with a face ang an hour hand was made.A.that B.until C.before D.when翻译一下,还有这里的that能不能省略?3.We hadn't met foe 20 years,but I recognized her __B__I saw her.A.for the moment B.the moment加个for好一些吧?4.I think I was at school,__C__I was staying with a friend during the vacation when I heard t

高中英语（连词）
1.You'll pass the exam __C__you study with a strong will.
A. unless B.until C.as long as D.as well as
C项作何解释
2.It was about 600 years ago__A__the first clock with a face ang an hour hand was made.
A.that B.until C.before D.when
翻译一下,还有这里的that能不能省略?
3.We hadn't met foe 20 years,but I recognized her __B__I saw her.
A.for the moment B.the moment
加个for好一些吧?
4.I think I was at school,__C__I was staying with a friend during the vacation when I heard the news.
A.and then B.even so C.or else. D.or so
这几个选项意思都不明白,句子也不明白