题目内容
Years ago we didn't know this, but recent science ________ that people who don't sleep well soon get ill.
[ ]
A.showed
B.has shown
C.will show
D.is showing
答案:B
提示:
提示:
|
recent实际上成为时态的信息词,don't sleep well和get ill可知谈论的是现在的事情。所以科学家“现在已经”作出判断。 |
练习册系列答案
相关题目