After her son died in a car accident, the old lady would sit at the window, ______ out and _______ in thought.    
#97224
A
looked; lost
B
looking; losing
C
looked; losing
D
looking; lost
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_______ to sunlight for too much time will do harm to one’s skin.
#90115
A
Being exposed
B
Exposed
C
Having exposed
D
After being exposed
 He found his son _______ inside the lift, _______ very worried.    
#91740
A
trapping; felt
B
trapped; felt
C
trapped; feeling
D
trapping; feeling
As far as I know, it was the car accident that led to ______.
#90132
A
him to be killed
B
kill him
C
him having killed
D
his being killed