When I came in, I saw her sitting in the sofa ______ in thought.  
#89858
A
to lose
B
losing
C
lost
D
being lost
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__________of danger in the street at night, she had to go home, with a friend_________ her. 
#94580
A
Warned, followed
B
Warning, following
C
Having warned, following
D
Having been warned, following
______ in thought, he almost ran into the car in front of him. 
#98054
A
Losing
B
Having lost
C
Lost
D
To lose
Most of the teachers ______ to visit our school were young ones.
#95272
A
invited
B
to invite
C
being invited
D
had been invited