(2014·山东实验中学一模)With his attention________on his mobile phone,he didn’t notice his headteacher’s appearance.
#90921
A
fixed 
B
having fixed
C
fixing
D
to fix
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In autumn, it’s beautiful outside with golden fallen leaves _______ the ground.
#91360
A
covering
B
to cover
C
having covered
D
covered
________,John returned to school from his hometown.
#90941
A
The summer vacation being over
B
The summer vacation is over
C
Because the summer vacation over
D
After the summer vacation being over