Old people need special care in winter, as they are very______ to sudden change of the weather.

The professor could tell by the _______look in Maris’s eyes that she didn’t understand a single word of his lecture

He is expected to give us a _________ description of the football game that was broadcast _________ yesterday evening .

Security cameras are restricted to ________ spaces，such as hallways and exits.There will be no cameras in classrooms，locker rooms(更衣室)or bathrooms.

 I'm sorry but what he thinks is not of the _____ importance to me.