问几道高中状语从句选择题……Nearly a month had gone by____they gave up the price for which they had held out.A.before B.so thatA.B为什么不行?Scientists are activelt searching for living things and sending messages into space_just__

问几道高中状语从句选择题……Nearly a month had gone by____they gave up the price for which they had held out.A.before B.so thatA.B为什么不行?Scientists are activelt searching for living things and sending messages into space_just__
问几道高中状语从句选择题……
Nearly a month had gone by____they gave up the price for which they had held out.
A.before B.so that
A.B为什么不行?
Scientists are activelt searching for living things and sending messages into space_just_____living things do exist.
A.in case B.as though
A.B为什么不行?
Whenever the professor explained something,she kept smiling and nodding her head from time to time_____understanding every word of his lecture.
A.as if B.like C.just like D.as though she
A.B或C为什么不行?

问几道高中状语从句选择题……Nearly a month had gone by____they gave up the price for which they had held out.A.before B.so thatA.B为什么不行?Scientists are activelt searching for living things and sending messages into space_just__
Nearly a month had gone by____they gave up the price for which they had held out.
A.before B.so that
答案：A.B为什么不行?
答：这要问出题目的人去.要我就不会出这样的题,因为AB两者都通的.
A.差不多过去了一个月他们才放弃先前他们坚持的那个价格.
这个句子的语境是：先前他们定的价比较高,一直没人买,坚持了近一个月,实在是卖不出去,最后才不得不放弃.
B. 差不多一个月已经过去了,所以他们放弃了先前坚持的那个价格.
语境差不多.
本题改自：
25． （上海市南汇中学 2010 届高三上学期零次考试）
Nearly a month had gone by they showed some sign of giving up the price for which they had held out.
A. before B. while C. until D. so that
这一题用A较好.
过了将近一个月他们才表露出迹象放弃先前坚持的价格.

1.一个月过去了，他们才放弃他们所坚持的价格。before 为“在……之前，多久以后……”，结合题目，在他们放弃价格之前，一个月过去了，言外之意，就是 一个月后他们放弃了坚持的价格。
2.in case "以防，万一"，as though= as if "似乎，好像"，结合提议，应理解为 科学家继续积极搜素生物以及向太空发送信息，以防生物的确真的存在。
3. 这题考的是省略，当从句...

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1.一个月过去了，他们才放弃他们所坚持的价格。before 为“在……之前，多久以后……”，结合题目，在他们放弃价格之前，一个月过去了，言外之意，就是 一个月后他们放弃了坚持的价格。
2.in case "以防，万一"，as though= as if "似乎，好像"，结合提议，应理解为 科学家继续积极搜素生物以及向太空发送信息，以防生物的确真的存在。
3. 这题考的是省略，当从句主语和主语主语一致时，可把从句的主语和be动词同时省略。题目完整说法应是 as if (she was) understanding every word of his lecture.

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Nearly a month had gone by____they gave up the price for which they had held out.
A.before B.so that
答案：A。B为什么不行？
by... 到...时间，引导时间状语从句，只能连表时间before；so that以至于...表结果。
全句：在他们放弃他们坚持的价格以前...

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Nearly a month had gone by____they gave up the price for which they had held out.
A.before B.so that
答案：A。B为什么不行？
by... 到...时间，引导时间状语从句，只能连表时间before；so that以至于...表结果。
全句：在他们放弃他们坚持的价格以前，几乎一个月已经过去了。

Scientists are activelt searching for living things and sending messages into space_just_____living things do exist.
A.in case B.as though
答案：A。B为什么不行？
in case(=If) 假使...万一...也许...，连词，引导条件状语从句。as if/though从属连词意义完全一样，表示：好像，仿佛，引导条件状语从句等，但as if 在当代英语中比 as though 普通得多。从句面意思看in case合适。
全句：科学家们在积极寻找生命，并发送消息到宇宙空间，万一生命确实存在

Whenever the professor explained something, she kept smiling and nodding her head from time to time_____understanding every word of his lecture.
A.as if B.like C. just like D.as though she
答案：A。 B或C为什么不行？
as if 和 like 在英语中都译做"像",但like侧重A B两者间的比较,并不意味着A和B属于一类或完全相似. as if 则侧重于同一性,意味着A B两者属于同一类或完全相似.
全句：不管教授讲解什么时，她总是微笑着点头，好象她理解教授讲稿的每一个词一样。

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近一个月他们才放弃了他们一直坚持的价格

A before 的意思是才    B so that 的意思是 

1.  因此

2. 以至于

3.  所以

   4.庶乎   都不符合  所以选A

科学家正积极寻找生物和发送邮件到宇宙来以防生物存在.（不是 activelt 哦）

B的意思是仿佛好像意思不对   而A  以备 以防  意思更贴切

每当教授解释什么的时候，她不停地点头微笑，好像理解教授说的每一句话。

A  好像  仿佛   B 表示举例子  比如啊 或行为动词喜欢  C 的话 just like 意思符合但不符合语法