题目内容
18．Oh，My goodness!You are still working on the assignment．It __________two days ago．（ ）| A． | must have been handed in | B． | can't have been handed in | ||
| C． | should have been handed in | D． | shouldn't be handed in |
分析 哦，天啦！你还在做作业啊．两天前就应该交了．
解答 答案：C 题干表达的是与事实相反的假设，要用虚拟；句意表达的对过去的事实的相反假设，要用情态动词加完成时态来构成，表示本应该做而没有做到的事；must/can't不能用来构成虚拟．故选C．
点评 虚拟语气是表示与事实相反的假设，构成方式有：对现在或将来，条件句中用一般过去时态，主语用情态动词加动词原形；对过去，条件句中用过去完成时态，主语用情态动词加完成时态．学习时，要牢记构成方式．
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19．American International Group was the largest insurance company in the US it suddenly closed down in September 2008．（ ）
| A． | after | B． | since | C． | as | D． | before |
6．
Posting a photo of the food you're about to eat on WeChat has become a daily ritual（惯例；仪式） for many．Often this food in the photo isn't as appealing to those looking at it，but scientists are now claiming taking a photo of your food before you eat it makes it taste better．
Researchers at University of Minnesota's Carlson School of Management claim taking a photo puts you in the moment and in doing so，heightens your （41）I．The person taking the photo will，on some level，feel the motivation to continue the practice．
Researchers wondered about the power of rituals after noticing the funny （42）K that people often perform before eating and drinking．They conducted experiments to investigate whether these kinds of habitual behaviour influences taste．
In the first experiment，some participants were asked to eat a piece of chocolate following a detailed set of （43）A：‘Without unwrapping the chocolate bar，break it in half．Unwrap half of the bar and eat it．Then，unwrap the other half and eat it．'The other participants were （44）E instructed to relax for a short amount of time and then eat the chocolate bar however they wanted．
The results showed that those who had performed the ritual rated the chocolate more （45）C，enjoyed it more，and were willing to pay more for the chocolate than the other group．
A second experiment （46）H these findings，showing that （47）B movements don't produce a more enjoyable eating experience．The data also （48）D that a longer delay between ritual and consumption enhanced these effects，even with a common food like carrots．
While these rituals may seem insignificant，the researchers note that the effects they produce are quite amazing．And while rituals are （49）J before mealtimes，they could play a role in other （50）G，too．
| A．instructions B．random C．highly D．revealed E．simply F．established G．situations H．confirmed I．senses J．common K．routines |
Researchers at University of Minnesota's Carlson School of Management claim taking a photo puts you in the moment and in doing so，heightens your （41）I．The person taking the photo will，on some level，feel the motivation to continue the practice．
Researchers wondered about the power of rituals after noticing the funny （42）K that people often perform before eating and drinking．They conducted experiments to investigate whether these kinds of habitual behaviour influences taste．
In the first experiment，some participants were asked to eat a piece of chocolate following a detailed set of （43）A：‘Without unwrapping the chocolate bar，break it in half．Unwrap half of the bar and eat it．Then，unwrap the other half and eat it．'The other participants were （44）E instructed to relax for a short amount of time and then eat the chocolate bar however they wanted．
The results showed that those who had performed the ritual rated the chocolate more （45）C，enjoyed it more，and were willing to pay more for the chocolate than the other group．
A second experiment （46）H these findings，showing that （47）B movements don't produce a more enjoyable eating experience．The data also （48）D that a longer delay between ritual and consumption enhanced these effects，even with a common food like carrots．
While these rituals may seem insignificant，the researchers note that the effects they produce are quite amazing．And while rituals are （49）J before mealtimes，they could play a role in other （50）G，too．
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