一、so far this year we____a fall in house prices by between 5

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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.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.

一、so far this year we____a fall in house prices by between 5 英语：so far this year we （） a fall in house prices by between So far this year we （）（see）a fall in house prices by between Sp far this year we_ a fall in house prices by between 5 and So far this year we __worked a fall in house prices by betwe 英语小问题So far this year we have seen a fall in house prices by So far this year we have seen a fall in pork prices by betwe In the country ,house prices d____ by 13% last year. So far this year we____ It's said the prices for house sale ( )(fall) a lot in the p House prices are likely to ________ at the end of this year. This factory has so far produced ( )as last year.