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
解析:
解析:
|
从recent“最近的”可知,应该用现在完成时态表示近期发生的动作。 |
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