Years ago we didn’t know this, but recent science ______that people who don’t sleep well soon get il...
2022-12-28 02:29:36 30次 2012年北师大版高中英语选修一Unit14练习卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
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
|
本题链接：
