随堂演练即时体验 巩固提升 ⅰ.单句语法填空(不多于3个单词) 1．so far this year we ________ (see) a fall in house prices by between 5 and 10 percent. 答案与解析 have seen 由句中的时间状语so far可知，句子用现在完成时。 2．— do you think we should accept that offer? — yes, we should, for we ________ (have) such bad luck up till now, and time ________ (run) out. 答案与解析 have had; is running 由时间状语up till now可
