1.-Did Jack come back early last night?-yes.i was not yet 8 o'clock——he arrived homeA.when B.before c.that D.until2.That was really a splendid night.It's years__I enjoyedmyself so much.A.when B.before C.that D.since3.It maybe 5 years__it is possi

1.-Did Jack come back early last night?-yes.i was not yet 8 o'clock——he arrived homeA.when B.before c.that D.until2.That was really a splendid night.It's years__I enjoyedmyself so much.A.when B.before C.that D.since3.It maybe 5 years__it is possi
1.-Did Jack come back early last night?
-yes.i was not yet 8 o'clock——he arrived home
A.when B.before c.that D.until
2.That was really a splendid night.It's years__I enjoyedmyself so much.
A.when B.before C.that D.since
3.It maybe 5 years__it is possible to test this machince.
A.since B.before C.that D.when

1.-Did Jack come back early last night?-yes.i was not yet 8 o'clock——he arrived homeA.when B.before c.that D.until2.That was really a splendid night.It's years__I enjoyedmyself so much.A.when B.before C.that D.since3.It maybe 5 years__it is possi
1.A.主要是时间点与一段时间的问题.
WHEN:it was+ (时刻,或时间点） when sth.happened.当某事发生时,是几点钟或哪一年如 :
It was five o'clock when we arrived at the small mountain village.
对比强调句型：It was at five o'clock that we arrived at the small mountain village.
如果这里是个强调句的话,那么去掉it was和that剩下的部分是一个句子
It was 1997 when Hongkong returned to China.
这里,it是人称代词,指时间,when引导时间状语从句.
BEFORE:it was +一段时间 before sth.happened.过了一段时间之后,某事才（就）发生了.如 :it was two years before Macao returned to China.
it will be +一段时间 before sth.happens.要过一段时间之后,某事才会发生.或不用过多久,某些就将发生：it won't be long before sth.happens.
2.D.“It +be(has been) +some time +since…”
“自……开始（结束）以来,已经过去多长时间”.
主句为“It is/has been+时间段”时,since从句通常用一般过去时；
主句为“It was/had been+时间段”时,since从句一般为过去完成时.
It is two months since he fell ill.
It has been over ten days since she left home.
It was over ten days since she had left home.
3.B是正确的

1、C
2、D
3、B

1.A when引导时间状语从句，译为“当。。。的时候”
2.D since表“自。。。（从句的动作结束）以来”如：It's years since he smoked。（他戒烟已多年了。）
3.B （首先题中的maybe应为may be）before引导时间状语从句，译为“。。。（段时间）之后，才。。。”
O(∩_∩)O~，谁告诉你答案的，准对吗？...

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1.A when引导时间状语从句，译为“当。。。的时候”
2.D since表“自。。。（从句的动作结束）以来”如：It's years since he smoked。（他戒烟已多年了。）
3.B （首先题中的maybe应为may be）before引导时间状语从句，译为“。。。（段时间）之后，才。。。”
O(∩_∩)O~，谁告诉你答案的，准对吗？

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a
b
a