一、so far this year we____a fall in house prices by between 5 and 10 percent.A saw B seeC had seenD have seen二、Though we don't know what discussed,yet we can feel the topic___A had changedB will changeC was changedD has been changed

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一、so far this year we____a fall in house prices by between 5 and 10 percent.A saw B seeC had seenD have seen二、Though we don't know what discussed,yet we can feel the topic___A had changedB will changeC was changedD has been changed

一、so far this year we____a fall in house prices by between 5 and 10 percent.A saw B seeC had seenD have seen二、Though we don't know what discussed,yet we can feel the topic___A had changedB will changeC was changedD has been changed
一、so far this year we____a fall in house prices by between 5 and 10 percent.
A saw
B see
C had seen
D have seen
二、Though we don't know what discussed,yet we can feel the topic___
A had changed
B will change
C was changed
D has been changed

一、so far this year we____a fall in house prices by between 5 and 10 percent.A saw B seeC had seenD have seen二、Though we don't know what discussed,yet we can feel the topic___A had changedB will changeC was changedD has been changed
一.D
“so far”用于完成时；
过去完成时表示“过去的过去”,则原句中必须还有表示过去时的动作与它呼应,例如：Yesterday,when I got to the station,I realized the train had left.“火车离开车站”发生在“我到站前”,所以用the train had left；
如果原句没有过去时,不能轻易用过去完成时,而用一般现在时.
二.D
“话题被转化”是被动,所以排除A.had changed和B.will change；
所谓现在完成时,一般是与现在时态有关的,原句有“we don't know”这一现在时提示,所以排除C.was changed.D.has been changed强调结果或影响.

1.D
2.D

DD

1 C(so far this year应该用have seen句式 强调这一年以来 已经看到了 用had)
2 A(主题已经变化了 而且是在其意识到之前）

D D

D
D

1、D so far 到目前为止，应该用现在完成时。
2、D 话题被换，并且大时态为现在时，所以用现在完成进行时。不过第二题的表达是不是有问题啊，好像没有主句啊

1 D
2 A

1 C
2 A

1。D
so far是到目前为止，很典型的现在完成时。
从过去的某一点出发延续至今（是否继续延续并不重要）
2.D
topic是被change了，可以确定是被动语态，排除AB
然后是主从句的关系，因为从句用了don't know,说明是现在时
主句要和从句保持一致，那么主句也应该是现在时
也就是D 现在完成时...

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1。D
so far是到目前为止，很典型的现在完成时。
从过去的某一点出发延续至今（是否继续延续并不重要）
2.D
topic是被change了，可以确定是被动语态，排除AB
然后是主从句的关系，因为从句用了don't know,说明是现在时
主句要和从句保持一致，那么主句也应该是现在时
也就是D 现在完成时

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