________ doing his experiment, he forgot to pick up his wife from the station. 
#13211
A
Absorbed in
B
Absorbed to
C
Absorbing in
D
Absorbing to
推荐题目
It is reported that the floods have left about _______ people homeless.
#14481
A
two thousand
B
two-thousands
C
two thousands
D
two thousands of
The doctor told me to take the medicine_____.
#12998
A
every fourth hours
B
each fourth hour
C
each four hours
D
every four hours