A-A+
Because of sleep loss most Americans______.A．
问题详情
Because of sleep loss, most Americans______.
A．have wide open eyes
B．are not fully alert
C．try to sleep more
D．live in the twilight zones
参考答案
正确答案：B
解析：文中“Most Americans no longer know what it feels like to be fully alert”说明长期少眠使美国人有些麻木。B项符合题意。
