问题补充:
Stay awake!You should know that it to sleep in class.
A. doesn’t permit
B. is not permitted
C. will not be permitted
D. was not permitted
答案:
A. doesn’t permit
(答案→)B. is not permitted
C. will not be permitted
D. was not permitted
解析:考查时态及语态,保持清醒!你应该知道课上不允许睡觉。根据语境应用一般现在时态,且表示被动,所以选C。