He was reading his book, completely _______ to the world. 
#98437
A
lost
B
losing
C
to lose
D
to have lost
推荐题目
The two old sisters,_______ so long,held each other and burst into tears.
#98165
A
being separated
B
having been separated
C
having separated
D
had been separated
The graduation ceremony,_______ at 9 pm yesterday, was followed by a film .
#92885
A
starting
B
being started
C
to start
D
to be started
The sun began to rise in the sky, ________ the mountain in golden light.
#91116
A
bathed
B
bathing
C
to have bathed
D
have bathed