_______ in the computer game, Peter didn’t notice his father approaching. 
#88699
A
Being lost
B
Lost
C
Losing
D
To lose
推荐题目
 ______ a good insulator , rubber is often used in cables.
#97954
A
Having been
B
To be
C
Be
D
Being
The church ,___________the 14th century , is still well preserved.
#94432
A
dates back to
B
dating back to
C
that dates back to
D
which dated back to