So mysteriously ______ missing that many puzzles wait to be solved.

Some adjustments have to be made to the timetable so that it can ______everybody that is concerned.[ ]

at the back of the room was a shy girl with two big eyes.

Did she say something in the lecture that _____you —Not really. Actually I felt sleepyover his speech.

Don’t you think it necessary that he________to Miami but to New York?— I agree, but the problem is________he has refused to[ ]