I didn’t see her in the meeting room this morning. She ______ have spoken at the meeting.

They demanded that the library _____ open to students during the vacation.

 You____scold such a pupil who always keeps silent so seriously that You______hurt him.

I     have passed my examination easily, but I made too many stupid mistakes.

To my surprise, my good friend _________ stay up to study to prepare for the next important exams organized by ten famous high schools.