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All the students were sweeping the floor     they heard a man     “help”.A. when, shouting B. while...

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were all expected   were all expecting    all were expected    all expected  
students present  present students   students presented  presenting students  
in store    in common    in all    in particular  
any  each  none  neither  
the students to fly the plane all the time  all students to fly the plane  the students who were not frightened to fly on their own  some students to fly a little while  
all of them    all of whom    all of that    all of which  
All students had traveled in commercial planes before.  All students were nervous.  Most students felt nervous traveling in commercial planes.  Most students felt nervous when they were taken up in a fighter plane.  
no one, to have    all, to have    none, to have    all, having  
all of them wore    all wearing    all of whom wearing    all were wearing  
were divided into  were divided   divid into  divided into  
all of them    all of whom    all of that    all of which  
is    are    was    were  
all of them worn    all were wearing    all of whom wearing    all wearing  
are all    were all    are both    were both  

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