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

下列哪种不是左向右分流的先天性心脏病

A．房间隔缺损
B．室间隔缺损
C．动脉导管未闭
D．心内膜垫缺损
E．法洛四联症